IKENAGA,Naoki - Faculty of Environmental and Urban Engineering Department of Chemical, Energy and Environmental Engineering

IKENAGA, Naoki

Faculty, Department/Institute

Faculty of Environmental and Urban Engineering Department of Chemical, Energy and Environmental Engineering

Academic status (qualification)

Professor Apr. 1,2011

Undergraduate Degrees・University

Kansai University Faculty of Engineering1986 Graduated

Graduate Degrees・University

Kansai University Doctor's Degree Program 1991 Completed

Academic Degrees

Doctor of Engineering Sep. 1991 Kansai University
Master of Engineering Mar. 1988 Kansai University

Homepage Address, E-mail Address

Homepage Address：http://www.cheng.kansai-u.ac.jp/Shokubai/HOME.html

Research fields	keyword
Catalyst and chemical process

research topic	CO2 reforming of hydrocarbons
Study theme state	Individual Research
research duration
Research Programs
keyword	CO2,reforming,hydrocarbon,
Research field
Research Topics Overview

research topic
Study theme state
research duration
Research Programs
keyword	,
Research field
Research Topics Overview

research topic
Study theme state
research duration
Research Programs
keyword	,
Research field
Research Topics Overview

Research Publications

No.	Type of publication	Date of publication (Date of presentation)	Title	Type of research result	Jointly authored or single authored	Publisher and journal name	Volume number
1	Papers1	2011～2011,00,00,,,	Effect of mineral matters in biomass on the gasification rate of their chars	Academic Journal	Co-authored	Biomass Conv. Bioref.	1, 17-28
2	Papers1	2011～2011,,,,,	The oxidative dehydrogenation of propane over NiO-ZrO2 catalyst	Academic Journal	Co-authored	Catal. Lett.	141, 68-77
3	Papers1	2011～2011,,,,,	Steam Reforming of Glycerin Using Ni-based Catalysts Loaded on CaO-ZrO2 Solid Solution	Academic Journal	Co-authored	Catal. Lett.	141, 895-905
4	Papers1	2011～2011,,,,,	Oxidative dehydrogenation of propane using lattice oxygen of vanadium oxides on silica	Academic Journal	Co-authored	Catal. Sci. Technol.	1, 987-998
5	International academic conference8	2010/12～2010,12,00,,,	Role of lattice oxygen of metal oxides in the dehydrogenation of ethylbenzene under carbon dioxide atmosphere		Co-author	2010 International Chemical Congress of Pacific Basin Societies	EMVR502
6	International academic conference8	2010/12～2010,12,00,,,	Preferential CO oxidation in hydrogen-rich stream over Ru/carbon catalysts		Co-author	2010 International Chemical Congress of Pacific Basin Societies	INOR1632
7	International academic conference8	2010/12～2010,12,00,,,	Oxidative dehydrogenation of propane with lattice oxygen of V2O5/SiO2		Co-author	2010 International Chemical Congress of Pacific Basin Societies	INOR1636
8	Papers1	2010～2010,,,,,	Oxidative dehydrogenation of ethane over NiO-loaded high surface area ZrO2 catalysts	Academic Journal	Co-authored	J. Jpn. Petrol. Inst.	53, 327-335
9	Papers1	2010～2010,,,,,	Role of Lattice Oxygen of Metal Oxides in the Dehydrogenation of Ethylbenzene under a Carbon Dioxide Atmosphere	Academic Journal	Co-authored	J. Phys. Chem. A	114, 3845-3854
10	Papers1	2010～2010,,,,,	Production of Synthesis Gas from Methane Using Lattice Oxygen of NiO-Cr2O3-MgO Complex Oxide	Academic Journal	Co-authored	Ind. Eng. Chem. Res.	49, 526-534
11	Papers1	2010～2010,,,,,	Selective oxidation of alcohols with molecular oxygen over Ru/CaO-ZrO2 catalyst	Academic Journal	Co-authored	J. Mol. Catal. A: Chem.	323, 7-15
12	99	2009～2009,,,,,	CO2 gasification behavior of various biomass chars-Effect of mineral matter in biomass char-	In-house publication	Co-author	Science and Technology Reports of Kansai University	51, 61-74
13	Papers1	2009～2009,,,,,	Palladium-loaded oxidized diamond catalysis for the selective oxidation of alcohols	Academic Journal	Co-authored	J. Mol. Catal. A: Chem.	306, 136-142
14	International academic conference8	2009～2009,,,,,	Production of syngas or hydrogen from CH4 using lattice oxygen of Fe-Cr complex oxide		Co-author	EuropaCatIX	P8-56
15	International academic conference8	2009～2009,,,,,	Oxidative dehydrogenation of propane with lattice oxygen of vanadium oxide		Co-author	EuropaCatIX	P13-20
16	Papers1	2008～2008,,,,,	Liquid-phase hydrogenation of alkenes and aromatic compounds with Pd-loaded oxidized diamond catalyst	Academic Journal	Co-authored	Chem. Intermed.	34, 603-615
17	International academic conference8	2008～2008,,,,,	Direct synthesis of H2O2 from H2 and O2 over Pd-loaded powdered diamond catalyst		Co-author	5th International Conference on Environmental Catalysis	344
18	Papers1	2008～2008,,,,,	Partial oxidation of CH4 with air to produce pure hydrogen and syngas	Academic Journal	Co-authored	Catal. Today	138, 141-146
19	International academic conference8	2007～2007,,,,,	Carbon nanofiber synthesis over Co-Mn catalyst		Co-author	Europacat VIII	P2-93
20	International academic conference8	2007～2007,,,,,	C-C bond formation over Pd-loaded oxidized diamond catalyst		Co-author	Europacat VIII	P5-34
21	International academic conference8	2007～2007,,,,,	Selective oxidation of alcohols with molecular oxygen over Pd-loaded oxidized diamond catalyst		Co-author	Europacat VIII	P5-35
22	International academic conference8	2007～2007,,,,,	Partial oxidation of CH4 to produce pure hydrogen with air		Co-author	Europacat VIII	P11-44
23	International academic conference8	2007～2007,,,,,	Steam reforming of methanol with CuO-ZnO loaded alumina wall tube reactor		Co-author	Europacat VIII	P11-55
24	Papers1	2007～2007,,,,,	Preparation of an alumina-wall tube reactor and its catalytic performance in steam-reforming of methanol	Academic Journal	Co-authored	Chem. Lett.	36, 1342-1343
25	99	2006～2006,,,,,	Promoting effect of CO2 on the degradation of polyethylene to ethylene and propylene over HZSM-5 catalyst	In-house publication	Co-author	Technology Reports of Kansai University	48， 53-62
26	Papers1	2006～2006,,,,,	Selective oxidation of methane to formaldehyde over antimony oxide－loaded catalyst	Academic Journal	Co-authored	J. Mol. Catal. A	250, 122－130
27	Papers1	2006～2006,,,,,	Carbon nanofiber formation on iron group metal-loaded on SiO2	Academic Journal	Co-authored	Diamond Relat. Mater.	15, 1080－1084
28	International academic conference8	2006～2006,,,,,	Oxidative dehydrogenation of propane over Ni－MO/ZrO2		Co-author	TOCAT 5	P－239
29	Papers1	2006～2006,,,,,	Oxidative dehydrogenation of ethane to ethylene over NiO loaded on high surface area MgO	Academic Journal	Co-authored	J. Mol. Catal. A：Chem.	260, 144－151
30	Papers1	2005～2005,,,,,	H2S Absorption Behavior of Calcium Ferrite Prepared in the Presence of Coal	Academic Journal	Co-authored	Energy Fuels	vol.19, 170-179
31	Papers1	2005～2005,,,,,	Carbon nanotube formation on Ni- or Pd-loaded diamond catalysts	Academic Journal	Co-authored	Diamond Relat. Mater.
32	Papers1	2005～2005,,,,,	Syhntesis of Fe2O3 in the capillary-tube reactor	Academic Journal	Co-authored	J. Materials Science
33	International academic conference8	2005～2005,,,,,	Partial oxidation of ethylene to synthesis gas over Coloaded catalysts		Co-author	Extended Abstracts of 10th Japan-Korea Symposium on Catalysis	159-160
34	International academic conference8	2005～2005,,,,,	Oxidative dehydrogenation of ethane over Ni-loaded catalyst		Co-author	7th European Congress on Catalysis	P1-32
35	International academic conference8	2005～2005,,,,,	CNT formation with 8-10 group metalloaded MgO catalysts		Co-author	7th European Congress on Catalysis	P1-33
36	International academic conference8	2005～2005,,,,,	Ammonia synthesis over alkali metal promoted Ru/O-Dia catalyst		Co-author	7th European Congress on Catalysis	P1-37
37	International academic conference8	2005～2005,,,,,	Dispersion of supported metal catalyst on oxidized diamond		Co-author	7th European Congress on Catalysis	P2-26
38	International academic conference8	2005～2005,,,,,	Carbon nanofiber formation on iron group metal-loaded SiO2		Co-author	16th European Conference on Diamond, Diamond-Like Materials, Carbon Nanotubes, Nitrides&Silicon Carbide	5.8.25
39	Papers1	2005～2005,,,,,	Production of Hydrogen by Steam Reforming of Glycerin on Ruthenium Catalyst	Academic Journal	Co-authored	Energy Fuels	19， 1761-1762
40	Papers1	2005～2005,,,,,	Partial oxidation of methane to synthesis gas over oxidized diamond supported catalysts-catalytic behavior of nickel and cobalt species	Academic Journal	Co-authored	J． Jpn． Petrol． Inst．	48， 290-300
41	Papers1	2005～2005,,,,,	Synthesis of Fe2O3 in the capillarytube reactor	Academic Journal	Co-authored	Journal of Material Science	40， 5011-5013
42	International academic conference8	2005～2005,,,,,	H2S Absorption Mechanism of Fe-Based Absorbents		Co-author	Proceedings of 2005 Int． Conf． on Coal Sci．&Technol.	2D07
43	International academic conference8	2005～2005,,,,,	SO2 Desulfurization Behavior of Ca- Based Absorbents Prepared with Oyster Shell and Organic Substances		Co-author	Proceedings of 2005 Int. Conf. on Coal Sci.&Technol.	2P506
44	Papers1	2004～2004,,,,,	Direct formation of formaldehyde from methane and carbon dioxide over vanadium oxide catalysts	Academic Journal	Co-authored	J. Mole. Catal. A	vol.211, 97-102
45	Papers1	2004～2004,,,,,	Preparation of zinc ferrite in the presence of carbon material and its application to hot-gas cleaning	Academic Journal	Co-authored	Fuel	vol.83, 661-669
46	Papers1	2004～2004,,,,,	Partial oxidation of methane to synthesis gas over oxidized diamond catalysts	Academic Journal	Co-authored	Appl. Catal. A	vol.264, 65-72
47	International academic conference8	2004～2004,,,,,	Oxidized Diamond as a Novel Support Material for Various Heterogeneous Catalytic Reactions		Co-author
48	International academic conference8	2004～2004,,,,,	CARBON NANOTUBE FORMATION ON Ni OR Pd-LOADED DIAMOND CATALYSTS		Co-author	15th European Conference on Diamond, Diamond-Like Materials, Carbon Nanotubes, Nitrides&Silicon Carbide	5. 5. 19
49	International academic conference8	2004～2004,,,,,	Development of Calcium Ferrite Prepared from Oyster Shell for H2S Absorption		Co-author	Proceedings of 21st Pittsburgh Coal Conference	P2-2
50	Papers1	2003～2003,,,,,	Partial oxidation of methane to synthesis gas over Ru-loaded Y2O3 catalysts	Academic Journal	Co-authored	Catal. Lett.	vol.82, 161-167
51	Papers1	2003～2003,,,,,	Dehydrogenation of light alkane over oxidized diamond-supported catalysts in the presence of carbon dioxide	Academic Journal	Co-authored	Catal. Today	vol.84, 149-157
52	Papers1	2003～2003,,,,,	The Role of Chemisorbed Oxygen on Diamond Surfaces for the Dehydrogenation of Ethane in the Presence of Carbon Dioxide	Academic Journal	Co-authored	J. Phys. Chem. B	vol.107, 4048-4056
53	Papers1	2003～2003,,,,,	Novel Selective Oxidation of Light Alkanes Using Carbon Dioxide. Oxidized Diamon as a Novel Catalytic Medium	Academic Journal	Co-authored	Chem. Lett.	vol.32, 866-867
54	Papers1	2003～2003,,,,,	Synthesis Gas Production from Methane Using Oxidized-Diamond-Supported Group VIII Metal Catalysts	Academic Journal	Co-authored	Energy Fuels	vol.17, 971-976
55	Papers1	2003～2003,,,,,	Direct Formation of Acetaldehyde from Ethane Using Carbon Dioxide as a Novel Oxidant over Oxidized Diamond-Supported Catalysts	Academic Journal	Co-authored	J. Phys. Chem. B	vol.107, 13419-13424
56	Papers1	2003～2003,,,,,	Oxidized Diamond as a Simultaneous Production Medium of Carbon Nanomaterials and Hydrogen for Fuel Cell	Academic Journal	Co-authored	Chem. Mater.	vol.15
57	Papers1	2002～2002,,,,,	CO2 Reforming of Methane over Ru-Loaded Lanthanoid Oxide Catalysts	Academic Journal	Co-authored	ACS Symposium Series	vol.809, 205-223
58	Papers1	2002～2002,,,,,	Dehydrogenation of Ethylbenzne over Vanadium Oxide-Loaded MgO Catalyst: Promoting Effect of Carbon Dioxid	Academic Journal	Co-authored	J. Catal.	vol.209, 16-24
59	Papers1	2002～2002,,,,,	Diamond-supported metal catalyst: a new medium for hydrogen production from methanol decomposition	Academic Journal	Co-authored	Catal. Lett.	vol.80, 161-164
60	Papers1	2002～2002,,,,,	Promoting Effect of Sulfur Compounds on the Degradation of Polyethylene	Academic Journal	Co-authored	Energy Fuels	vol.16, 1314-1320
61	Papers1	2002～2002,,,,,	Oxidized diamond as a new catalyst support	Academic Journal	Co-authored	Stud. Sur. Sci. Catal.	vol.143, 1073-1079
62	Papers1	2002～2002,,,,,	Preparation of activated carbon-supported ferrite for absorbent of hydrogen sulfide at a low temperature	Academic Journal	Co-authored	Fuel	vol.81, 1569-1576
63	Papers1	2002～2002,,,,,	Steam Reforming of Dodecane over Supported Iridium Catalyst	Academic Journal	Co-authored	J. Jpn. Petrol. Inst.	vol.45, 409-413
64	Papers1	2001～2001,,,,,	Transient response of catlyst bed temperature in the pulsed reaction of partial oxidation of methane to synthesis gas over supported groupⅧ metal catalysts	Academic Journal	Co-authored	Catalysts Today	64, 31-41
65	Papers1	2001～2001,,,,,	Co-liquefaction of Micro Algae with Using Coal Liquefaction Catalysts	Academic Journal	Co-authored	Energy&Fuels	15, 350-355
66	Papers1	2001～2001,,,,,	Alumina plate-loaded ruthenium catalysts for coal liquefaction	Academic Journal	Co-authored	Fuel	80, 1015-1020
67	Papers1	2001～2001,,,,,	Oxidized Diamond Supported Ni Catalyst for Synthesis Gas Formation from Methane	Academic Journal	Co-authored	Chemistry Letters	460-461
68	Papers1	2001～2001,,,,,	Role of Carbon Dioxide in the Dehydrogenation of Ethane over Gallium-Loaded Catalysts	Academic Journal	Co-authored	J. Catal.	vol.203
69	Papers1	2000～2000,,,,,	Sulfiding behavior of iron based coal liquefaction catalyst	Academic Journal	Co-authored	Fuel
70	Papers1	2000～2000,,,,,	Dehydrogenation of ethylbenzene with an activated carbon-supported vanadium catalyst	Academic Journal	Co-authored	Applied Catalysis
71	Papers1	2000～2000,,,,,	Dehydrogenation of Ethylbenzene with Carbon Dioxide Using Activated Carbon-Supported Catalysts	Academic Journal	Co-authored	Industrial&Engineering Chemistry Research
72	Papers1	2000～2000,,,,,	Coliquefaction of Coal with Polyethylene Using Fe(CO)5-S as Catalyst	Academic Journal	Co-authored	ENERGY&FUELS
73	Papers1	2000～2000,,,,,	Promoting effect of carbon dioxide on the dehydrogenation and aromatization of ethane over gallium-loaded catalysts	Academic Journal	Co-authored	Catalysis Letters	64, 215-221
74	Papers1	2000～2000,,,,,	Dehydrogenation of isopropylbenzene with vanadium-oxide-loaded activated carbon catalyst in the presence of carbon dioxide	Academic Journal	Co-authored	Catalysis Letters	69, 59-64
75	Papers1	2000～2000,,,,,	Oxidation Capability of Carbon Dioxide in the Dehydrogenation of Ethylbenzene over Vanadium Oxide-Loaded MgO Catalyst	Academic Journal	Co-authored	Chemistry Letters	526-527
76	Papers1	2000～2000,,,,,	Reactivity of Carbon Species Formed on Supported Nobel Metal Catalysts in Methane Conversion Reactions	Academic Journal	Co-authored	Energy&Fuels	14, 612-617
77	Papers1	1999～1999,,,,,	Reaction mechanisms of carbon dioxide reforming of methane with Ru-loaded lanthanum oxide catalyst	Academic Journal	Co-authored	Applied Catalysis
78	Papers1	1999～1999,,,,,	Alkylation of benzene with ethane over platinum-loaded H-ZSM5 catalyst	Academic Journal	Co-authored	Chemistry Letter
79	Papers1	1999～1999,,,,,	Transient Response of Catalyst Bed Temperature in the Pulsed Reaction of Partial Oxidation of Methane to Synthesis Gas over Supported Rhodium and Iridium Catalysts	Academic Journal	Co-authored	J. Catalysis
80	Papers1	1999～1999,,,,,	Partial oxidation of methane to synthesis gas over iridium-nickel bimetallic catalysts	Academic Journal	Co-authored	Applied Catalysis
81	Papers1	1998～1998,,,,,	Coal hydroliquefaction using highly dispersed catalyst precursors	Academic Journal	Co-authored	Catalysis Today
82	Papers1	1998～1998,,,,,	Dehydrogenation of isobutane with iron-loaded activated carbon catalyst	Academic Journal	Co-authored	Applied Catalysis
83	Papers1	1998～1998,,,,,	Partial oxidation methane to synthesis gas over supported iridium catalysts	Academic Journal	Co-authored	Applied Catalysis
84	Papers1	1998～1998,,,,,	Effect of support on the conversion of methane to synthesis gas over supported iridium catalysts	Academic Journal	Co-authored	Catalysis Letter
85	Papers1	1998～1998,,,,,	Dehydrogenation of ethane over gallium oxide in the presence of carbon dioxide	Academic Journal	Co-authored	Chemical Communication
86	Papers1	1997～1997,,,,,	Reactions of Coal Model Compounds in the Presence of Hydrogen Donor Solvents and Highly DispersedCatalysts	Academic Journal	Co-authored	ENERGY&FUELS
87	Papers1	1997～1997,,,,,	CO2 Reforming of Heptane Using Rnthenium-loaded Lanthanum Oxide Catalyst	Academic Journal	Co-authored	Sekiyu Gakkaishi
88	Papers1	1997～1997,,,,,	Liquefaction of micro-algae with iron catalyst	Academic Journal	Co-authored	Fuel
89	Papers1	1995～1995,,,,,	CO2 Gasification of Iron-Loaded Carbons : Activation of the Iron Catalyst with CO.	Academic Journal	Co-authored	ENERGY&FUELS
90	Papers1	1995～1995,,,,,	Oxidative dehydrogenation of ethylbenzene with carbon dioxide.	Academic Journal	Co-authored	Applied Catalysis
91	Papers1	1994～1994,,,,,	Hydrogen-Transfer Reaction of Coal Compounds in Tetralin with Dispersed Catalysts.	Academic Journal	Co-authored	ENERGY&FUELS
92	Papers1	1994～1994,,,,,	Coal Hydroliquefaction with Iron-Loaded Coal as Catalyst.	Academic Journal	Co-authored	ENERGY&FUELS

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PapersIn refereedAcademic JournalCo-authoredKIYOKAWA, Takayasu;IKENAGA,Naoki2021/5～

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PapersIn refereedAcademic JournalCo-authoredFUKU, Kojiro;TAKIOKA, R.;IWAMURA, K.;TODOROKI, M.;SAYAMA, K.;IKENAGA,Naoki2020/4～

PapersIn refereedIn-house publicationCo-authoredIKENAGA,Naoki;HATAYAMA, Junsuke;FUKU, Kojiro2020/3～

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PapersEffect of mineral matters in biomass on the gasification rate of their charsIn refereedAcademic JournalCo-authoredIKENAGA,Naoki;;;;;Biomass Conv. Bioref.1, 17-282011～

PapersThe oxidative dehydrogenation of propane over NiO-ZrO2 catalystIn refereedAcademic JournalCo-authoredFukudome, K.;Kanno, A.;Ikenaga, N.;Miyake, T.;Suzuki, T.;Catal. Lett.141, 68-772011～

PapersSteam Reforming of Glycerin Using Ni-based Catalysts Loaded on CaO-ZrO2 Solid SolutionIn refereedAcademic JournalCo-authoredKitamura, S.;Su-enaga, T.;Ikenaga, N.;Miyake, T.;Suzuki, T.;Catal. Lett.141, 895-9052011～

PapersOxidative dehydrogenation of propane using lattice oxygen of vanadium oxides on silicaIn refereedAcademic JournalCo-authoredIKENAGA,Naoki;;;;Catal. Sci. Technol.1, 987-9982011～

BookIn refereedMonographCo-authorIKENAGA,Naoki;;2011～

International academic conferenceRole of lattice oxygen of metal oxides in the dehydrogenation of ethylbenzene under carbon dioxide atmosphereCo-authorIkenaga, N.;Saito, K.;Okuda, K.;Miyake, T.;Suzuki, T.;2010 International Chemical Congress of Pacific Basin SocietiesEMVR5022010/12～

International academic conferencePreferential CO oxidation in hydrogen-rich stream over Ru/carbon catalystsCo-authorHoriuchi, N.;Miyake, T.;Suzuki, T.;Ikenaga, N.;2010 International Chemical Congress of Pacific Basin SocietiesINOR16322010/12～

International academic conferenceOxidative dehydrogenation of propane with lattice oxygen of V2O5/SiO2Co-authorFukudome, K.;Ikenaga, N.;Miyake, T.;Suzuki, T.;2010 International Chemical Congress of Pacific Basin SocietiesINOR16362010/12～

PapersOxidative dehydrogenation of ethane over NiO-loaded high surface area ZrO2 catalystsIn refereedAcademic JournalCo-authoredSakitani, K.;Nakamura, K.;Ikenaga, N.;Miyake, T.;Suzuki, T.;J. Jpn. Petrol. Inst.53, 327-3352010～

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PapersRole of Lattice Oxygen of Metal Oxides in the Dehydrogenation of Ethylbenzene under a Carbon Dioxide AtmosphereIn refereedAcademic JournalCo-authoredSaito, K.;Okuda, K.;Ikenaga, N.;Miyake, T.;Suzuki, T.;J. Phys. Chem. A114, 3845-38542010～

PapersProduction of Synthesis Gas from Methane Using Lattice Oxygen of NiO-Cr2O3-MgO Complex OxideIn refereedAcademic JournalCo-authoredNakayama, O.;Ikenaga, N.;Miyake, T.;Yagasaki, E.;Suzuki, T.;Ind. Eng. Chem. Res.49, 526-5342010～

PapersSelective oxidation of alcohols with molecular oxygen over Ru/CaO-ZrO2 catalystIn refereedAcademic JournalCo-authoredYasu-eda, T.;Kitamura, S.;Ikenaga, N.;Miyake, T.;Suzuki, T.;J. Mol. Catal. A: Chem.323, 7-152010～

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CO2 gasification behavior of various biomass chars-Effect of mineral matter in biomass char-UnrefereedIn-house publicationCo-authorIkenaga, N.;Nakajima, H.;Oda, H.;Suzuki, T.;Science and Technology Reports of Kansai University51, 61-742009～

Academic presentationCo-authorIKENAGA,Naoki;IKENAGA Naoki;;2009～

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PapersPalladium-loaded oxidized diamond catalysis for the selective oxidation of alcoholsIn refereedAcademic JournalCo-authoredYasu-eda, T.;Se-ike, R.;Ikenaga, N.;Miyake, T.;Suzuki, T.;J. Mol. Catal. A: Chem.306, 136-1422009～

International academic conferenceProduction of syngas or hydrogen from CH4 using lattice oxygen of Fe-Cr complex oxideCo-authorOkamoto, N.;Nakayama, O.;Ikenaga, N.;Miyake, T.;Suzuki, T.;EuropaCatIXP8-562009～

International academic conferenceOxidative dehydrogenation of propane with lattice oxygen of vanadium oxideCo-authorFukudome, K.;Ikenaga, N.;Miyake, T.;Suzuki, T.;EuropaCatIXP13-202009～

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Academic presentationCo-authorIKENAGA,Naoki;IKENAGA Naoki;;;2008～

PapersLiquid-phase hydrogenation of alkenes and aromatic compounds with Pd-loaded oxidized diamond catalystIn refereedAcademic JournalCo-authoredN. Ikenaga;T. Kiyomi;I. Yonezawa;C. Yukawa;T. Suzuki;Chem. Intermed.34, 603-6152008～

International academic conferenceDirect synthesis of H2O2 from H2 and O2 over Pd-loaded powdered diamond catalystCo-authorR. Yamane;N. Ikenaga;T. Miyake;T. Suzuki;5th International Conference on Environmental Catalysis3442008～5th International Conference on Environmental CatalysisBelfast (Ireland)

Academic presentationCo-authorIKENAGA,Naoki;;IKENAGA Naoki;;;2008～

Academic presentationCo-authorIKENAGA,Naoki;IKENAGA Naoki;;;2008～

Academic presentationCo-authorIKENAGA Naoki;;;2008～

Academic presentationCo-authorIKENAGA,Naoki;IKENAGA Naoki;;;2008～

Academic presentationCo-authorIKENAGA,Naoki;;;IKENAGA Naoki;;;2008～

Academic presentationCo-authorIKENAGA,Naoki;;IKENAGA Naoki;;;2008～

PapersPartial oxidation of CH4 with air to produce pure hydrogen and syngasIn refereedAcademic JournalCo-authoredNakayama, O.;Ikenaga, N.;Miyake, T.;Yagasaki, E.;Suzuki, T.;Catal. Today138, 141-1462008～

Academic presentationCo-authorIKENAGA,Naoki;;;IKENAGA Naoki;;2007～

Academic presentationCo-authorIKENAGA,Naoki;;IKENAGA Naoki;;2007～

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Academic presentationCo-authorIKENAGA,Naoki;IKENAGA Naoki;;;2007～

International academic conferenceCarbon nanofiber synthesis over Co-Mn catalystCo-authorT. Udagawa;Y. Yamada;N. Ikenaga;T. Miyake;T. Suzuki;Europacat VIIIP2-932007～Europacat VIIITurku （Finland）

International academic conferenceC-C bond formation over Pd-loaded oxidized diamond catalystCo-authorR. Se-ike;T. Yasu-eda;N. Ikenaga;T. Miyake;T. Suzuki;Europacat VIIIP5-342007～Europacat VIIITurku （Finland）

International academic conferenceSelective oxidation of alcohols with molecular oxygen over Pd-loaded oxidized diamond catalystCo-authorT. Yasu-eda;R. Se-ike;N. Ikenaga;T. Miyake;T. Suzuki;Europacat VIIIP5-352007～Europacat VIIITurku （Finland）

International academic conferencePartial oxidation of CH4 to produce pure hydrogen with airCo-authorO. Nakayama;N. Ikenaga;T. Miyake;E. Yagasaki;T. Suzuki;Europacat VIIIP11-442007～Europacat VIIITurku （Finland）

International academic conferenceSteam reforming of methanol with CuO-ZnO loaded alumina wall tube reactorCo-authorF. Naka-o;N. Ikenaga;T. Miyake;T. Suzuki;Europacat VIIIP11-552007～Europacat VIIITurku （Finland）

Academic presentationCo-authorIKENAGA,Naoki;;IKENAGA Naoki;;;2007～

Academic presentationCo-authorIKENAGA,Naoki;IKENAGA Naoki;;;2007～

Academic presentationCo-authorIKENAGA,Naoki;;IKENAGA Naoki;;;2007～

PapersPreparation of an alumina-wall tube reactor and its catalytic performance in steam-reforming of methanolIn refereedAcademic JournalCo-authoredF. Naka-o;N. Ikenaga;T. Miyake;T. Suzuki;Chem. Lett.36, 1342-13432007～

BookCo-authorIKENAGA Naoki;;2007～

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Academic presentationCo-authorIKENAGA,Naoki;IKENAGA Naoki;;;2007～

Promoting effect of CO2 on the degradation of polyethylene to ethylene and propylene over HZSM-5 catalystIn-house publicationCo-authorN． Ikenaga;Y．Miyamura;T． Suzuki;Technology Reports of Kansai University48， 53-622006～

Academic presentationCo-authorIKENAGA,Naoki;IKENAGA Naoki;;;2006～

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Academic presentationCo-authorIKENAGA,Naoki;;;IKENAGA Naoki;;;2006～

PapersSelective oxidation of methane to formaldehyde over antimony oxide－loaded catalystIn refereedAcademic JournalCo-authoredH. Matsumura;K. Okumura;T. Shimamura;N. Ikenaga;M. Miyake;T. Suzuki;J. Mol. Catal. A250, 122－1302006～

PapersCarbon nanofiber formation on iron group metal-loaded on SiO2In refereedAcademic JournalCo-authoredY. Yamada;Y. Hosono;N. Murakoshi;N. Higashi;H. Ichi－oka;T. Miyake;N. Ikenaga;T. Suzuki;Diamond Relat. Mater.15, 1080－10842006～

International academic conferenceOxidative dehydrogenation of propane over Ni－MO/ZrO2Co-authorA. Kanno;K. Nakamura;N. Ikenaga;T. Miyake;T. Suzuki;TOCAT 5P－2392006～TOCAT 5Tokyo（Japan）

Academic presentationCo-authorIKENAGA,Naoki;;IKENAGA Naoki;;;2006～

Academic presentationCo-authorIKENAGA,Naoki;IKENAGA Naoki;;;2006～

PapersOxidative dehydrogenation of ethane to ethylene over NiO loaded on high surface area MgOIn refereedAcademic JournalCo-authoredK. Nakamura;N. Ikenaga;T. Miyake;T. Konishi;T. Suzuki;J. Mol. Catal. A：Chem.260, 144－1512006～

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Academic presentationCo-authorIKENAGA,Naoki;IKENAGA Naoki;;2006～

PapersH2S Absorption Behavior of Calcium Ferrite Prepared in the Presence of CoalIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Y. Ohgaito;T. Suzuki;Energy Fuelsvol.19, 170-1792005～

BookCo-authoredIKENAGA,Naoki;;IKENAGA Naoki;;2005～

Academic presentationCo-authorIKENAGA,Naoki;IKENAGA Naoki;;;2005～

Academic presentationCo-authorIKENAGA,Naoki;;IKENAGA Naoki;;;2005～

Academic presentationCo-authorIKENAGA,Naoki;IKENAGA Naoki;;;2005～

Academic presentationCo-authorIKENAGA,Naoki;;IKENAGA Naoki;;;2005～

PapersCarbon nanotube formation on Ni- or Pd-loaded diamond catalystsIn refereedAcademic JournalCo-authoredN. Higashi;N. Ikenaga;T. Miyake;T. Suzuki;Diamond Relat. Mater.2005～

PapersSyhntesis of Fe2O3 in the capillary-tube reactorIn refereedAcademic JournalCo-authoredT. Miyake;T. Ueda;N. Ikenaga;H. Oda;M. Sano;J. Materials Science2005～

International academic conferencePartial oxidation of ethylene to synthesis gas over Coloaded catalystsCo-authorN. Iwasaki;N. Ikenaga;T. Miyake;T. Suzuki;Extended Abstracts of 10th Japan-Korea Symposium on Catalysis159-1602005～10th Japan-Korea Symposium on CatalysisMatsue(Japan)

International academic conferenceOxidative dehydrogenation of ethane over Ni-loaded catalystCo-authorK. Nakamura;H. Matsumura;N. Ikenaga;T. Miyake;T. Suzuki;7th European Congress on CatalysisP1-322005～7th European Congress on CatalysisSofia (Bulgaria)

International academic conferenceCNT formation with 8-10 group metalloaded MgO catalystsCo-authorH. Ichi-oka;N. Higashi;N. Ikenaga;T. Miyake;T. Suzuki;7th European Congress on CatalysisP1-332005～7th European Congress on CatalysisSofia (Bulgaria)

International academic conferenceAmmonia synthesis over alkali metal promoted Ru/O-Dia catalystCo-authorH. Matsumoto;N. Ikenaga;T. Miyake;T. Suzuki;7th European Congress on CatalysisP1-372005～7th European Congress on CatalysisSofia (Bulgaria)

International academic conferenceDispersion of supported metal catalyst on oxidized diamondCo-authorT. Kitano;T. Hirai;N. Ikenaga;T. Miyake;T. Suzuki;7th European Congress on CatalysisP2-262005～7th European Congress on CatalysisSofia (Bulgaria)

International academic conferenceCarbon nanofiber formation on iron group metal-loaded SiO2Co-authorY. Hosono;N. Murakoshi;Y. Yamada;N. Higashi;A. Ichi-oka;N. Ikenaga;T. Suzuki;16th European Conference on Diamond, Diamond-Like Materials, Carbon Nanotubes, Nitrides&Silicon Carbide5.8.252005～16th European Conference on Diamond, Diamond-Like Materials, Carbon Nanotubes, Nitrides&Silicon CarbideToulouse (France)

Academic presentationCo-authorIKENAGA,Naoki;;IKENAGA Naoki;;;2005～

Academic presentationCo-authorIKENAGA,Naoki;;;IKENAGA Naoki;;2005～

PapersProduction of Hydrogen by Steam Reforming of Glycerin on Ruthenium CatalystIn refereedAcademic JournalCo-authoredT． Hirai;N． Ikenaga;T． Miyake;T． Suzuki;Energy Fuels19， 1761-17622005～

PapersPartial oxidation of methane to synthesis gas over oxidized diamond supported catalysts-catalytic behavior of nickel and cobalt speciesIn refereedAcademic JournalCo-authoredH． Nishimoto;N． Ikenaga;K． Nakagawa;T． Konishi;T． Suzuki;J． Jpn． Petrol． Inst．48， 290-3002005～

PapersSynthesis of Fe2O3 in the capillarytube reactorIn refereedAcademic JournalCo-authoredT． Miyake;T． Ueda;N， Ikenaga;H． Oda;M． Sano;Journal of Material Science40， 5011-50132005～

International academic conferenceH2S Absorption Mechanism of Fe-Based AbsorbentsCo-authorN． Ikenaga;M． Hamana;T． Suzuki;Proceedings of 2005 Int． Conf． on Coal Sci．&Technol.2D072005～2005 Int． Conf． on Coal Sci．&Technol.Okinawa (Japan)

International academic conferenceSO2 Desulfurization Behavior of Ca- Based Absorbents Prepared with Oyster Shell and Organic SubstancesCo-authorN． Ikenaga;H． Nakajima;S． Yamamizu;T． Suzuki;Proceedings of 2005 Int. Conf. on Coal Sci.&Technol.2P5062005～2005 Int. Conf. on Coal Sci.&Technol.Okinawa (Japan)

Academic presentationCo-authorIKENAGA,Naoki;;IKENAGA Naoki;;2005～

Academic presentationCo-authorIKENAGA,Naoki;IKENAGA Naoki;;;2005～

PapersDirect formation of formaldehyde from methane and carbon dioxide over vanadium oxide catalystsIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Shimamura T.;Okumura K.;Nakagawa K.;Ando T.;Suzuki T.;J. Mole. Catal. Avol.211, 97-1022004～

PapersPreparation of zinc ferrite in the presence of carbon material and its application to hot-gas cleaningIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Ohgaito Y;Matsushima H;Suzuki T;Fuelvol.83, 661-6692004～

PapersPartial oxidation of methane to synthesis gas over oxidized diamond catalystsIn refereedAcademic JournalCo-authoredIKENAGA Naoki;H. Nishimoto;K. Nakagawa;M.N.-Gamo;T.Ando;T. Suzuki;Appl. Catal. Avol.264, 65-722004～

PapersIn refereedAcademic JournalCo-authoredIKENAGA,Naoki;;;IKENAGA Naoki;;2004～

International academic conferenceOxidized Diamond as a Novel Support Material for Various Heterogeneous Catalytic ReactionsCo-authorT. Suzuki;K. Takeda;T. Honsho;N. Ikenaga;2004～13th International Congress on CatalysisParis(France)

International academic conferenceCARBON NANOTUBE FORMATION ON Ni OR Pd-LOADED DIAMOND CATALYSTSCo-authorN. Higashi;N. Ikenaga;T. Miyake;T. Suzuki;15th European Conference on Diamond, Diamond-Like Materials, Carbon Nanotubes, Nitrides&Silicon Carbide5. 5. 192004～15th European Conference on Diamond, Diamond-Like Materials, Carbon Nanotubes, Nitrides&Silicon CarbideRiva Del Garda(Italy)

International academic conferenceDevelopment of Calcium Ferrite Prepared from Oyster Shell for H2S AbsorptionCo-authorM. Hamana;N. Ikenaga;T. Suzuki;Proceedings of 21st Pittsburgh Coal ConferenceP2-22004～21st Pittsburgh Coal ConferenceOsaka(Japan)

Academic presentationCo-authorIKENAGA Naoki;;;;;2004～

Academic presentationCo-authorIKENAGA,Naoki;IKENAGA Naoki;;;2004～

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Academic presentationCo-authorIKENAGA,Naoki;;;IKENAGA Naoki;;2004～

PapersPartial oxidation of methane to synthesis gas over Ru-loaded Y2O3 catalystsIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Nishimoto H.;Nakagawa K.;Suzuki T.;Catal. Lett.vol.82, 161-1672003～

PapersDehydrogenation of light alkane over oxidized diamond-supported catalysts in the presence of carbon dioxideIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Nakagawa K.;Kajita C.;Gamo M-N.;Ando T.;Suzuki T.;Catal. Todayvol.84, 149-1572003～

PapersThe Role of Chemisorbed Oxygen on Diamond Surfaces for the Dehydrogenation of Ethane in the Presence of Carbon DioxideIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Nakagawa K.;Kajita C.;Suzuki T.;Kobayashi T.;Gamo M-N.;Ando T.;J. Phys. Chem. Bvol.107, 4048-40562003～

PapersNovel Selective Oxidation of Light Alkanes Using Carbon Dioxide. Oxidized Diamon as a Novel Catalytic MediumIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Nakagawa K.;Okumura K.;Shimamura T.;Suzuki T.;Kobayashi T.;Gamo;M-N.;Ando T.;Chem. Lett.vol.32, 866-8672003～

PapersSynthesis Gas Production from Methane Using Oxidized-Diamond-Supported Group VIII Metal CatalystsIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Nakagawa K.;Nishimoto H.;Kikuchi M.;Egashira S.;Enoki Y.;Suzuki T.;Gamo M-N.;Kobayashi T.;Ando T.;Energy Fuelsvol.17, 971-9762003～

PapersDirect Formation of Acetaldehyde from Ethane Using Carbon Dioxide as a Novel Oxidant over Oxidized Diamond-Supported CatalystsIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Okumura K.;Nakagawa K.;Shimamura T.;Gamo M-N.;Ando T.;Kobayashi T.;Suzuki T.;J. Phys. Chem. Bvol.107, 13419-134242003～

PapersOxidized Diamond as a Simultaneous Production Medium of Carbon Nanomaterials and Hydrogen for Fuel CellIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Nakagawa K.;Yamagishi M.;Nishimoto H.;Suzuki T.;Kobayashi T.;Gamo M-N.;Ando T.;Chem. Mater.vol.152003～

PapersCO2 Reforming of Methane over Ru-Loaded Lanthanoid Oxide CatalystsIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Nakagawa K.;Hideshima S.;Akamatsu N.;Matsui N.;Suzuki T.;ACS Symposium Seriesvol.809, 205-2232002～

PapersDehydrogenation of Ethylbenzne over Vanadium Oxide-Loaded MgO Catalyst: Promoting Effect of Carbon DioxidIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Sakurai Y.;Suzaki T.;Nakagawa K.;Aota H.;Suzuki T.;J. Catal.vol.209, 16-242002～

PapersDiamond-supported metal catalyst: a new medium for hydrogen production from methanol decompositionIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Nakagawa　K.;Hashida　T.;Kajita　C.;Kobayashi　T.;Gamo　M-N.;Suzuki　T.;Ando T.;Catal. Lett.vol.80, 161-1642002～

PapersPromoting Effect of Sulfur Compounds on the Degradation of PolyethyleneIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Shiro T.;Kanno T.;Aratani K.;Katsura Y.;Suzuki T.;Energy Fuelsvol.16, 1314-13202002～

PapersOxidized diamond as a new catalyst supportIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Suzuki T.;Nakagawa K.;Ando T.;Stud. Sur. Sci. Catal.vol.143, 1073-10792002～

PapersPreparation of activated carbon-supported ferrite for absorbent of hydrogen sulfide at a low temperatureIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Chiyoda;N.;Matsushima;H.;Suzuki;T.;Fuelvol.81, 1569-15762002～

PapersSteam Reforming of Dodecane over Supported Iridium CatalystIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Ando T.;Nakagawa K.;Suzuki T.;J. Jpn. Petrol. Inst.vol.45, 409-4132002～

PapersTransient response of catlyst bed temperature in the pulsed reaction of partial oxidation of methane to synthesis gas over supported groupⅧ metal catalystsIn refereedAcademic JournalCo-authoredIKENAGA Naoki;K. Nakagawa;R. Kobayashi;T. Suzuki;Catalysts Today64, 31-412001～Mechanisms of partial oxidation of methane to synthesis gas were studied using a pulsed reaction technique and temperature jump measurement. Catalyst bed temperatures were directly measured by introducing 1 and 3 ml pulses of a mixture of CH4 and O2 (2/1). With Ir, Pt and Ni/TiO2 catalysts, a sudden temperature increase at the front edge of the catalyst bed was observed upon introduction of the pulse. The synthesis gas production basically proceeded via two-step paths consisting of highly exothermic complete methane oxidation to give H2O and CO2, followed by the endothermic reforming of methane with H2O and CO2. In contrast, with the Rh and Pd/TiO2 catalysts, the temperature at the front edge of the catalyst bed decreased upon introduction of the CH4/O2 (2/1) pulse and a small increase in the temperature at the rear end was observed. Initially, the endothermic decomposition of CH4 to H2 and deposited carbon or CHx probably took place at the front edge of the catalyst bed, after which the deposited carbon or generated CHx species would be oxidized into COx. When the Ru/TiO2 catalyst was used, a temperature increase at the front edge of the catalyst bed was observed upon introduction of the 3 ml pulse of CH4/O2. In contrast, the temperature drop at the front edge of the catalyst bed was observed for a 1 ml pulse of CH4/O2. These results seemed to exhibit two possibilities for a synthesis gas formation route over the Ru/TiO2 catalyst. The reaction pathway of the partial oxidation of methane with group VIII metal-loaded catalysts depended strongly upon the metal species and reaction conditions.Grant-in-Aid for Scientific Research

PapersCo-liquefaction of Micro Algae with Using Coal Liquefaction CatalystsIn refereedAcademic JournalCo-authoredIKENAGA Naoki;C. Ueda;T. Matsui;M. Ohtsuki;T. Suzuki;Energy&Fuels15, 350-3552001～Co-liquefaction of micro algae (Chlorella, Spirulina, and Littorale) with coal (Australian Yallourn brown coal and Illinois No.6 coal) was carried out under pressurized H2 in 1- methylnaphthalene at 350-400℃ for 60 min with various catalysts. Co-liquefaction of Chlorella with Yalloun coal was successfully achieved with exess sulfer to iron (S/Fe=4), where sufficient amount of Fe1-XS, which is believed to be the active species in the coal liquefaction, was produced. The conversion and the yield of the hexane-soluble fraction were close to the values calculated from the additivity of the product yields of the respective homo-reactions. In the reaction with a one-to-one mixture of Chlorella and Yalloun coal, 99.8% of conversion and 65.5% of hexane-soluble fraction were obtained at 400℃ with Fe(CO)5 at S/Fe=4. When Littorale and Spirulina were used as micro algas, a similar tendency was obtserved with the iron catalyst. On the other hand, in the co-liquefaction with Illinois No. 6 coal, which is known to contain a large amount of sulfer in the form of catalytically active pyrite, the Co-liquefaction was close to the additivity of the respective reaction with Fe(CO)5-S, even at S/Fe=2. Ru3(CO)12 was also effective for the Co-liquefaction of micro algae with coal.Kansai University Grant-in-Aid for the Faculty Joint Research Program

PapersAlumina plate-loaded ruthenium catalysts for coal liquefactionIn refereedAcademic JournalCo-authoredIKENAGA Naoki;K. Kondo;T. Kawanishi;T. Suzuki;Fuel80, 1015-10202001～In order to prevent the plugging of a catalyst bed into a fixed bed-catalyzed coal liquefaction process, a ruthenium loaded on alumina plate catalyst is proposed. Coal slurry could pass through wide channels between plate type catalysts without leaving residue or ash. The alumina plate was prepared by anodic oxidation of an aluminum plate, and then the ruthenium was loaded onto the alumina plate from aqueous ruthenium(III) chloride solution.In the liquefaction of Tanito Harum coal with only the alumina plate in the absence of ruthenium, coal conversion of 49.4% and oil yield of 29.7% were obtained. The coal conversion and the oil yield increased with the loading of ruthenium onto the alumina plate, and they reached maxima (conversion: 86.5%, oil yield: 40.3%) when 0.6 mmol of ruthenium was loaded. The ruthenium loaded on an alumina plate exhibited higher activity for the coal liquefaction than ruthenium (Ru=0.6 mmol, 5 wt%) loaded on alumina powder (conversion: 69.7%, oil yield: 36.9%).

PapersOxidized Diamond Supported Ni Catalyst for Synthesis Gas Formation from MethaneIn refereedAcademic JournalCo-authoredIKENAGA Naoki;K. Nakagawa;H. Nishimoto;Y. Enoki;S.Egashira;T. Kobayashi;M. -N. Gamo;T.Ando;T. Suzuki;Chemistry Letters460-4612001～Oxidized diamond gave the best performance among the support materials of Ni loaded catalysts for the partial oxidation of methane. Ni(5wt%)/oxidized diamond afforded 20% conversion of methane (CH4/O2=5) to give CO and H2 ratio of 2.0 at 873 K. Ni(5wt%)/oxidized diamond also showed high catalytic activity for the CO2 reforming of methane.Japan Society for the Promotion of Science

PapersRole of Carbon Dioxide in the Dehydrogenation of Ethane over Gallium-Loaded CatalystsIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Nakagawa K.;Kajita C.;Okumura K.;Gamo M-N.;Ando T.;Kobayashi T.;Suzuki T.;J. Catal.vol.2032001～

PapersSulfiding behavior of iron based coal liquefaction catalystIn refereedAcademic JournalCo-authoredIKENAGA Naoki;H. Taniguchi;A. Watanabe;T. Suzuki;Fuel2000～In order to understand the transformation mechanisms of iron-sulfur catalyst systems to pyrrhotite, the iron-sulfur catalysts (γ-FeOOH, α-FeOOH, Fe(CO)5, and Fe3(CO)12) were heat-treated at 150 ・420 ーC with or without an activated carbon, and then subjected to XRD and XPS analyses. Pyrrhotite (Fe1-xS) was the major phase at above 200 ーC in the XRD profiles of all iron-sulfur catalysts. However, the formation of pyrite (FeS2) from α-FeOOH and γ-FeOOH on the catalyst surface was observed at 150 ・325 ーC by XPS analyses. This seems to indicate that active species Fe1-xS would be transformed through FeS2 as an intermediate, but iron carbonyl complexes were directly transformed into pyrrhotite without the formation of FeS2.

PapersDehydrogenation of ethylbenzene with an activated carbon-supported vanadium catalystIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Y. Sakurai;T. Suzaki;T. Suzuki;Applied Catalysis2000～Dehydrogenation of ethylbenzene over supported vanadium catalysts was carried out at 723 - 923K, W/F of 35 - 105g-cath/mol in a carbon dioxide atmosphere (carbon dioxide/ethylbenzene of 50 - 70mmol/mmol) and in an argon atmosphere. The catalyst, 1.0mmol of vanadium loaded on 1g of activated carbon, afforded the highest ethylbenzene conversion of 67.1%, a styrene yield of 54.2% and a styrene selectivity of 80.8% at 550K with a W/F of 70g-cath/mol of ethylbenzene in carbon dioxide. Ethylbenzene conversion and styrene yield in the presence of carbon dioxide were 14.0% higher than those in argon. During the course of the reaction, carbon dioxide was reduced to the corresponding amount of carbon monoxide against the styrene yield. As a result, the same amount of water was produced.

PapersDehydrogenation of Ethylbenzene with Carbon Dioxide Using Activated Carbon-Supported CatalystsIn refereedAcademic JournalCo-authoredIKENAGA Naoki;T. Tsuruda;K. Senma;T. Yamaguchi;Y. Sakurai;T. Suzuki;Industrial&Engineering Chemistry Research2000～Dehydrogenation of ethylbenzene to styrene under excess carbon dioxide flow was carried out over activated carbon-supported metal oxide catalysts (Cr, Mn, Co, Ni, Mo, Ru, La, Ce) at 823 K and W/F = 35 g-catalyst・h/mol. The highest yield of styrene (about 40%) with selectivity of above 80% was obtained using the activated carbon-supported chromium oxide (Cr/AC) and cerium oxide (Ce/AC) catalysts. The initial activity of the Cr/AC and Ce/AC catalysts were comparable to that of an iron-loaded activated carbon catalyst reported previously. Only chromium(III) oxide and cerium(IV) oxide were detected by XRD before and after reactions at higher loading levels, and these species might have been active forms. However, reduced chromium oxide species was detected by XPS after the reaction under argon. In addition to the produced styrene, the equivalent amounts of carbon monoxide and water were formed. These results suggest that the dehydrogenation of ethylbenzene to styrene proceeds via two reaction paths. One is the simple dehydrogenation and an oxidation reaction of hydrogen formed with carbon dioxide. The other is the oxidative dehydrogenation of ethylbenzene through the redox cycle of chromium(III) oxide.Kansai University Grant-in-Aid for the Faculty Joint Research Program

PapersColiquefaction of Coal with Polyethylene Using Fe(CO)5-S as CatalystIn refereedAcademic JournalCo-authoredIKENAGA Naoki;T. Kanno;M. Kimura;T. Suzuki;ENERGY&FUELS2000～The coliquefaction of Yallourn coal (YL) with polyethylene (PE) was carried out at 400 or 425 ℃under pressurized H2 in 1-methylnaphthalene or tetralin. In the coliquefaction without a catalyst, the conversion and the oil yield increased by 11-12% as compared to that of expected value from the additive values of respective runs. We considered that free radicals produced from YL coal were stabilized by the hydrogen abstraction from PE during the coliquefaction, and as a result β-scission of PE markedly proceeded. The addition of a large amount of Fe(CO)5-S catalyst (Fe =1.0 mmol, 2.79 wt%, S/Fe = 2) increased the conversion and the hexane soluble oil yield in the homoliquefaction of YL coal or PE, except for the conversion of PE in the reaction with TL. However, this catalyst did not promote the conversion and the hexane-soluble oil yield in the coliquefaction of YL coal with PE. When the amount of the iron catalyst was decreased to 0.4 mmol (1.12 wt%) against the same amount of coal and PE, the conversion and the oil yield in the coliquefaction run increased as compared to the reaction without or with the large amount of catalyst (Fe =1.0 mmol). Since the excess amount of the catalyst rapidly provided hydrogen from the gas phase to YL coal-derived free radicals, hydrogen transfer from PE to YL coal decreased greatly.Kansai University Grant-in-Aid for the Faculty Joint Research Program

PapersPromoting effect of carbon dioxide on the dehydrogenation and aromatization of ethane over gallium-loaded catalystsIn refereedAcademic JournalCo-authoredIKENAGA Naoki;K. Nakagawa;C. Kajita;Y. Ide;M. Okumura;S. Kato;H. Kasuya;T. kobayashi;T. Suzuki;Catalysis Letters64, 215-2212000～Ga2O3 and Ga2O3/TiO2 catalysts were found to be effective agents for the dehydrogenation of ethane to ethene in the presence of carbon dioxide at 650℃. the activity of the Ga2O3 and Ga2O3/TiO2 catalysts in the presence of CO2 was 2-4 times higher than that without CO2. Ethene yields reached ca. 20-25% and selectivity was Ca.70-90% at 650℃in the 17 5 ethane and 83% CO2 feed at an SV of 9,000 ml/(g-cat h). The presence of CO2 markedly promoted dehydrogenation of ethane over Ga2O3 and Ga2O3/ TiO2 catalysts. Furthermore, the promoting effect of CO2 on the aromatization of ethane and athene over a Ga2O3 + H/ ZSM-5 catalyst was also observed above 650℃. Aromatics yields were higher than those without CO2.Japan Society for the Promotion of Science

PapersDehydrogenation of isopropylbenzene with vanadium-oxide-loaded activated carbon catalyst in the presence of carbon dioxideIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Y. Sakurai;T. Suzaki;K. Nakagawa;T. Suzuki;Catalysis Letters69, 59-642000～Dehydrogenation of isopropylbenzene to a-methylstyrene was carried out using various supported metal oxide catalysts in the presence of carbon dioxide. An activated carbon-supported vanadium oxide catalyst afforded a high activity in carbon dioxide atmosphere: the a-methylstyrene yield in carbon dioxide atmosphere was two times greater than that in an argon atmosphere at 793 K. In order to investigate the role of carbon dioxide in this reaction, we carried out temperature-programmed reduction (TPR) studies using both fresh and used catalysts. The TPR profiles clearly indicate that carbon dioxide could keep the surface of vanadium oxide at a high oxidation state.Grant-in-Aid for Scientific Research

PapersOxidation Capability of Carbon Dioxide in the Dehydrogenation of Ethylbenzene over Vanadium Oxide-Loaded MgO CatalystIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Y. Sakurai;T. Suzaki;K. Nakagawa;H. Aota;T. Suzuki;Chemistry Letters526-5272000～Carbon dioxide could oxidize the reduced vanadium oxide species on MgO and keep vanadium species at a high oxidation state, during the dehydrogenation of ethylbenzene to styrene under carbon dioxide, giving a markedly high yield and selectivity of styrene.

PapersReactivity of Carbon Species Formed on Supported Nobel Metal Catalysts in Methane Conversion ReactionsIn refereedAcademic JournalCo-authoredIKENAGA Naoki;N. Matsui;K. Nakagawa;T. Suzuki;Energy&Fuels14, 612-6172000～The reactivity of carbon species formed from methane decomposition over supported noble metal catalysts was examined. In the Ru-loaded case, the rate of formation of CHx species in the decomposition of CH4 and the amount of CHx species over Ru are independent of the type of support. However, the carbon species on Ru/La2O3 seems to be more uniform and reactive than that on Ru/Al2O3. After the decomposition of CH4 over Ru-loaded catalysts was carried out at 70The reactivity of carbon species formed from methane decomposition over supported noble metal catalysts was examined. In the Ru-loaded case, the rate of formation of CHx species in the decomposition of CH4 and the amount of CHx species over Ru are independent of the type of support. However, the carbon species on Ru/La2O3 seems to be more uniform and reactive than that on Ru/Al2O3. After the decomposition of CH4 over Ru-loaded catalysts was carried out at 700℃, a temperature-programmed reaction with D2 was carried out. CD4 was the major product on all the supports, and only slight amounts of CH3D, CH2D2, and CHD3 were detected over La2O3, ZrO2, and Y2O3 supports. The reactivity of CHx species on Ru strongly depends on the supports. The reactivity of CHx species on Ru and Rh loaded on La2O3 can be divided into two categories. These categories are not based on the differences in the number of x in CHx species. On Ru, x in the CHx species is equal to nearly 0, with a very small portion having x=2. On the other hand, x is almost exclusively 0 on Rh. It seems that Rh leads to a higher rate of decomposition for methane than does Ru.0, a temperature-programmed reaction with D2 was carried out. CD4 was the major product on all the supports, and only slight amounts of CH3D, CH2D2, and CHD3 were detected over La2O3, ZrO2, and Y2O3 supports. The reactivity of CHx species on Ru strongly depends on the supports. The reactivity of CHx species on Ru and Rh loaded on La2O3 can be divided into two categories. These categories are not based on the differences in the number of x in CHx species. On Ru, x in the CHx species is equal to nearly 0, with a very small portion having x=2. On the other hand, x is almost exclusively 0 on Rh. It seems that Rh leads to a higher rate of decomposition for methane than does Ru.Japan Society for the Promotion of Science

PapersReaction mechanisms of carbon dioxide reforming of methane with Ru-loaded lanthanum oxide catalystIn refereedAcademic JournalCo-authoredIKENAGA Naoki;N. Matsui;K. Anzai;N. Akamatsu;K. Nakagawa;T. Suzuki;Applied Catalysis1999～A pulsed reaction technique was applied to discuss the effect of support on the activities and mechanisms in the CO2 reforming of methane over Ru catalyst. The reaction was carried out using a fixed bed reactor equipped with an on-line mass spectrometer. Four supports: La2O3, Y2O3 and ZrO2 which showed high activity and Al2O3, commonly used one in the reforming reaction, were compared when loaded with Ru. After feeding CO2 at 600℃, we introduced a pulse of CH4 over Ru/La2O3 catalyst under Ar steady flow. We observed the response of CO which was generated from the reaction with CHx on the ruthenium and the Rux formed during CO2 treatment or during the reaction of RuHx with adsorbed CO2 onto the La2O3. Over Ru/Al2O3 catalyst, however, very small response of CO was observed. A pulse of 13CO2 was introduced under CH4 steady flow over Ru/La2O3, Ru/Y2O3 and Ru/ZrO2 catalysts. Symmetrical 13CO responses were observed, but a small response of 12CO from 12CHx continued to evolve after generation of 13CO from 13CO2 ceased. The following reaction cycle is believed to occur in the CO2 reforming of methane on active supports: A part of metallic ruthenium reacted with CH4 to give Ru-CHx; simultaneously ruthenium metal could be oxidized with CO2 to give Ru-Ox and CO; and then, oxygen transfer from Ru-Ox to Ru-CHx took place to give CO and metallic ruthenium. Distinct temperature increases in the catalyst bed for La2O3, Y2O3 and ZrO2 supports were observed with the introduction of CO2 pulses under Ar flow. On the other hand, a very small increase in the temperature of the catalyst bed was observed on Al2O3. These results indicate that CO2 reforming of CH4 with ruthenium loaded catalysts was strongly assisted by the activation of CO2 adsorbed on the basic sites.

PapersAlkylation of benzene with ethane over platinum-loaded H-ZSM5 catalystIn refereedAcademic JournalCo-authoredIKENAGA Naoki;S. Kato;K. Nakagawa;T. Suzuki;Chemistry Letter1999～

PapersTransient Response of Catalyst Bed Temperature in the Pulsed Reaction of Partial Oxidation of Methane to Synthesis Gas over Supported Rhodium and Iridium CatalystsIn refereedAcademic JournalCo-authoredIKENAGA Naoki;K. Nakagawa;Y. Teng;T. Kobayashi;T. Suzuki;J. Catalysis1999～Mechanisms of partial oxidation of methane were studied using a pulsed reaction technique and temperature jump measurement. Catalyst bed temperatures were directly measured by introducing a pulse of a mixture of methane and oxygen (2/1). With Ir/TiO2 catalyst, a sudden temperature increase at the front edge of the catalyst bed was observed upon introduction of the pulse, but the temperature of the rear end of the catalyst bed increased only slightly. The synthesis gas production basically proceeded via a two-step path consisting of highly exothermic methane complete oxidation to give H2O and CO2, followed by the endothermic reforming of methane with H2O and CO2 over Ir/TiO2 catalyst. However, with Rh/TiO2 and Rh/Al2O3 catalysts, the temperature at the front edge of the catalyst bed decreased upon introduction of the CH4/O2 (2/1) pulse, and a small increase in the temperature at the rear end was observed. At first, endothermic decomposition of CH4 to H2 and deposited carbon or CHx probably took place at the front edge of the catalyst bed and then deposited carbon or generated CHx species would be oxidized into Cox. However, on Rh/SiO2, synthesis gas was produced via a two-step path similar to the case of Ir/TiO2 catalyst. The reaction pathway of partial oxidation of methane with Rh-loaded catalysts depended strongly on the support materials.

PapersPartial oxidation of methane to synthesis gas over iridium-nickel bimetallic catalystsIn refereedAcademic JournalCo-authoredIKENAGA Naoki;K. Nakagawa;Y. Teng;T. Kobayashi;T. Suzuki;Applied Catalysis1999～Partial oxidation of methane to synthesis gas was carried out using supported iridium-nickel bimetallic catalysts, in order to reduce loading levels of iridium and nickel, and to avoid carbon deposition on nickel-based catalysts by adding iridium. The performance of supported iridium-nickel bimetallic catalysts in synthesis gas formation depended strongly upon the support materials. La2O3 gave the best performance among the support materials tested. Ir(0.25wt%)-Ni(0.5wt%)/La2O3 afforded 36% conversion of methane (CH4/O2=5) to give CO and H2 with the selectivities of above 90% at 800℃, and those at 600℃ were 25.3% conversion of methane and CO and H2 selectivities of about 80%, respectively. Reduced monometallic Ir(0.25wt%)/La2O3 and Ni(0.5wt%)/La2O3 catalysts did not produce synthesis gas at 600℃. A higher conversion of methane was obtained by synergistic effects. The product concentrations of CO, H2, and CO2, and CH4 conversion were maintained in high values, even increasing the space velocity of feed gas over Ir-Ni/La2O3 catalyst, indicating that rapid reaction takes place. As a by-product, a small amount of carbon deposition was observed, but carbon formation decreased with increasing the space velocity. On the other hand, with reduced monometallic Ni(10wt%)/La2O3 catalyst, yield of synthesis gas and carbon decreased with increasing the space velocity.

PapersCoal hydroliquefaction using highly dispersed catalyst precursorsIn refereedAcademic JournalCo-authoredIKENAGA Naoki;S.Kan-nan;T.Sakoda;T.Suzuki;Catalysis Today1998～In order to discuss the hydrogen transfer process in coal liquefaction with a catalyst in the presence of a donor solvent, hydroliquefaction of Yallourn, Wyoming, Illinois No.6, and Mi-ike coals and cracking of benzyl phenyl ether (BPE) were carried out in tetralin or tetralin/naphthalene mixed solvent under a hydrogen atmosphere with highly dispersed catalyst precursors such as Fe(CO)5-S, Mo(CO)6-S, and Ru3(CO)12. In the absence of the catalyst, more than 70 % of hydrogen was transferred from tetralin, as determined by the formation of naphthalene. In the presence of Mo(CO)6-S and Ru3(CO)12, however, the amount of hydrogen transferred from tetralin decreased to 15 - 40 % of the total hydrogen and that from gas phase increased to 60 - 85 % of the hydrogen required to stabilize coal fragment radicals even with an excess amount of tetralin. When the reaction was carried out in the tetralin/naphthalene mixed solvent, little hydrogenation of naphthaleneoccurred even with the active catalyst.This strongly supports the assertion that a decrease in the amount of naphthalene in the catalyzed liquefaction of coal in tetralin with a catalyst can be ascribed to the direct hydrogen transfer from molecular hydrogen to coal fragment radicals. In the presence of coal or benzyl phenyl ether, little or no hydrogenation of naphthalene occurred.Grant-in-Aid for Scientific Research on Priority Areas

PapersDehydrogenation of isobutane with iron-loaded activated carbon catalystIn refereedAcademic JournalCo-authoredIKENAGA Naoki;H.Shimada;T.Akasawa;T.Suzuki;Applied Catalysis1998～Dehydrogenation of isobutane to isobutene was successufully carried out on iron loaded activated carbon catalyst at 873K. Isobutane conversion of 48%, the yield of 40% and selctivity 80% were obtained with 0.3mmol iron loaded on 1g of activated carbon, at 873K with W/F of 25g-cat-h/mol of isobutane. Cofeeding of carbon dioxide promoted dehydrogenation as compared to feeding bulk isobutane or isobutane and argon mixture. Hydrogen produced by dehydrogenation was transformed into water in the presence of carbon dioxide, and carbon dioxide was reduced to carbon monoxide. A redox cycle of Fe3O4 and metallic iron is suggested for the catalytic cycle in carbon dioxide by analyzing XRD and XPS. Carbon deposition was reduced under a carbon dioxide stream as compared with the reaction under argon atmosphere.Grant-in-Aid for Scientific Research

PapersPartial oxidation methane to synthesis gas over supported iridium catalystsIn refereedAcademic JournalCo-authoredIKENAGA Naoki;K.Nakagwa;T.Suzuki;T.Kobayashi;M.Haruta;Applied Catalysis1998～

PapersEffect of support on the conversion of methane to synthesis gas over supported iridium catalystsIn refereedAcademic JournalCo-authoredIKENAGA Naoki;K. Nakagawa;K. Anzai;N. Matsui;T. Suzuki;Y. Teng;T. Kobayashi;M. Haruta;Catalysis Letter1998～A partial oxidation of methane was carried out using iridium catalysts supported on several metal oxides. The productivity of the synthesis gas from methane was strongly affected by the choice of support oxides for the catalysts. The synthesis gas production proceeded basically via a two-step reaction consisting of methane combustion to give H2O and CO2, followed by the reforming of methane from CO2 and steam. Although the combustion and the reforming of methane from steam did not depend upon the catalyst support, a large variation in the catalytic activity for the reforming of methane from CO2 was observed over Ir catalysts with different supports. The support activity order in the reforming of methane from CO2 with iridium catalysts was as follows: TiO2>=ZrO2>=Y2O3>La2O3>MgO>=Al2O3>SiO2. The same order was observed in the synthesis gas production from the partial oxidation of methane.

PapersDehydrogenation of ethane over gallium oxide in the presence of carbon dioxideIn refereedAcademic JournalCo-authoredIKENAGA Naoki;K. Nakagawa;M. Okamura;T. Suzuki;T. Kobayashi;Chemical Communication1998～

PapersReactions of Coal Model Compounds in the Presence of Hydrogen Donor Solvents and Highly DispersedCatalystsIn refereedAcademic JournalCo-authoredIKENAGA Naoki;T.Sakoda;T.Matsui;K.Ohno;T.Suzuki;ENERGY&FUELS1997～Reactions of 1,2-(1,1'-)dinaphthylethane (DNE) and 1,2-diphenylethane (DPE) in a hydrogen donor solvent in the absence or in the presence of highly dispersed catalysts such as Mo(CO)6-S and Ru(acac)3 were carried out at 658 or 698 K under a hydrogen atmosphere in order to investigate quantitative hydrogen transfer process in the cracking of C-C bond in coal. Dinaphthylethane mainly produced 1-methylnaphthalene, and diphenylethane afforded benzene, toluene and ethylbenzene as the major low molecular weight products. In addition, hydrogenation of DNE and DPE occurred. In the absence of a catalyst, more than 70 mol% of hydrogen was transferred from the hydrogen donor solvent. In the presence of Mo and Ru catalyst, the hydrogen required for stabilizing free radicals and hydrogenating aromatic rings was predominantly derived from gas phase without or with a small amount of the solvent. However, the amount of hydrogen transferred from gas phase considerably decreased and the amounts of hydrogenated products and decomposed products of DNE and DPE lowered with increasing concentration of the hydrogen donor solvent even with the dispersed Mo or Ru catalyst. The hydrogen donor solvent retarded the catalyzed cracking of DNE and DPE because of competitive adsorption of the model compound and the hydrogen donor solvent on the catalyst surface.

PapersCO2 Reforming of Heptane Using Rnthenium-loaded Lanthanum Oxide CatalystIn refereedAcademic JournalCo-authoredIKENAGA Naoki;S.Fujimura;K.Nakagwa;T.Suzuki;Sekiyu Gakkaishi1997～

PapersIn refereedAcademic JournalCo-authoredIKENAGA Naoki;;;;;1997～Hydrodeoxygenation of methyl substituted phenols (phenol, methylphenols, dimethylphenols, trimetylphenols) was carried out using Co-Mo/Al2O3 and Ni-Mo/Al2O3 catalysts in a fixed bed flow reactor. Major products were substituted benzenes and cyclohexanes. Larger amounts of substituted cyclohexanes were obtained when Ni-Mo/Al2O3 was used, indicating that deoxygenation of phenols proceeded via hydrogenation of aromatic rings of phenols followed by dehydration. In the reactions over Co-Mo/Al2O3, substituted benzenes were formed as major products, indicating that OH group was directly removed. Methyl substituent at 3, 4, or 5- position of phenol promoted hydrodeoxygenation reaction as compared to phenol. This phenomenon was pronounced in the reaction over Co-Mo/Al2O3 catalyst. Interaction between OH group with active site on the catalyst surface may have been enhanced by electron releasing capability of methyl substituents. On the contrary, hydrodeoxygenation of 2,6-dimethylphenol (or 2,4,6-trimethylphenol) was significantly retarded by the steric hindrance of two methyl groups. Again this tendency was more clearly observed with Co-Mo/Al2O3 catalyst as compared to Co-Mo/Al2O3. These results strongly supported differences in the hydrodeoxygenation reaction paths between these catalysts.

PapersLiquefaction of micro-algae with iron catalystIn refereedAcademic JournalCo-authoredIKENAGA Naoki;T.Matsui;A.Nishihara;C.Ueda;M.Ohtsuki;T.Suzuki;Fuel1997～Liquefaction of Spirulina, a high-protein microalga, afforded>90 wt% of THF-soluble products and 60 wt% of hexane-soluble fractions, in the temperature range 300-425℃ under hydrogen in various organic solvents with highly dispersed catalysts. The oil yield increased from 52.3 to 66.9 wt% with Fe(CO)5-S catalyst at 350℃ for 60 min in tetralin under 5.0 Mpa of hydrogen. Hydrogen activated by the dispersed catalyst contributed to an increase in oil yield. Liquefaction in water as solvent gave a higher oil yield of 78.3 wt% at 350℃ even under nitrogen. Liquefaction in toluene gave oil fractions of high carbon content and lower oxygen content, with a heating value of 32-33 MJ/kg. On the contrary, oil fractions obtained in water had a lower carbon content and higher oxygen content, with a lower heating value of 26 MJ/kg. The presence of moderate amount of water is considered to be effective for the production of oil of high heating value in high yield. FT-IR. Spectroscopy and gel permeation chromatograph, showed that production of oil fractions proceeded via thermal decomposition of polypeptides and hydrolysis by water produced during liquefaction in organic solvents.

PapersCO2 Gasification of Iron-Loaded Carbons : Activation of the Iron Catalyst with CO.In refereedAcademic JournalCo-authoredIKENAGA Naoki;S.Tanaka;T.Uemura;K.Ishizaki;K.Nagayoshi;H.Ohme;T.Suzuki;H.Yamashita;M.Anpo;ENERGY&FUELS1995～

PapersOxidative dehydrogenation of ethylbenzene with carbon dioxide.In refereedAcademic JournalCo-authoredIKENAGA Naoki;M.Sugino;H.Shimada;T.Tsuruda;H.Miura;T.Suzuki;Applied Catalysis1995～An attempt to use carbon dioxide as a diluent and oxidant in the dehydrogenation of ethylbenzene to styrene was carried out over an activated carbon-supported iron catalyst (Fe 17 wt.-%) at 773-973 K, CO2/ethylbenzene = 50-70 mol/mol and W/F = 30-120 g h/mol. An addition of 20-30 mol-% lithium nitrate to iron resulted in a significant increase in the catalytic activity. The highest yield of styrene (40-45%) with more than 90% selectivity was obtained at a ratio of lithium to iron of 0.1-0.2 (mol/mol). In addition to styrene, carbon monoxide and water were formed as products. This indicated that the reaction proceeds via an oxidative dehydrogenation mechanism. Added lithium nitrate was converted into lithium ferrite during the treatment of an iron-lithium co-loaded activated carbon catalyst under carbon dioxide at 973 K. Lithium ferrite thus formed would be an active center of the reaction.Grant-in-Aid for Scientific Research

PapersIn refereedAcademic JournalCo-authoredIKENAGA Naoki;;;;Journal of the Japan Institute of Energy1995～Grant-in-Aid for Scientific Research on Priority Areas

PapersHydrogen-Transfer Reaction of Coal Compounds in Tetralin with Dispersed Catalysts.In refereedAcademic JournalCo-authoredIKENAGA Naoki;Y.Kobayashi;S.Saeki;T.Sakota;Y.Watanabe;H.Yamada;T.Suzuki;ENERGY&FUELS1994～In order to discuss quantitative hydrogen-transfer process, cracking of benzyl phenyl ether (BPE) and dibenzyl ether (DBE) in tetralin using highly dispersed catalyst precursors such as Fe(CO)5, Mo(CO)6, and Ru(acac)3 was carried out at 648K under a hydrogen atmosphere. Identified products from cracking of BPE were benzene, toluene, phenol, diphenylmethane, 1,2-diphenylethane, isomeric (hydroxylphenyl)phenylmethane, benzyltetralin, and benzylnaphthalene, and identified products from DBE were benzaldehyde and benzyl alcohol in addition to the above substances except phenol. The required amount of hydrogen to stabilize free radicals from BPE was in good agreement with the amount of hydrogen transferred from tetralin and gas phase. In the absence of a catalyst, more than 90 mol% of hydrogen was transferred from tetralin. In the presence of Mo(CO)6-S, the amount of hydrogen transferred from tetralin decreased to around 15 mol% of hydrogen and the amount of hydrogen transferred from the gas phase increased to around 85 mol% of hydrogen required for stabilizing free radicals. Similar observation was obtained in the reaction with DBE without or with added catalysts. In the reaction of BPE or DBE in tetralin, hydrogenation of naphthalene to tetralin did not occur or occurred slightly even with active catalysts. The direct hydrogen transfer from molecular hydrogen to radicals occurred in the cracking of BPE and DBE with active catalysts such as dispersed Ru or Mo.

PapersCoal Hydroliquefaction with Iron-Loaded Coal as Catalyst.In refereedAcademic JournalCo-authoredIKENAGA Naoki;S.Okamoto;A.Kitajima;H.Taniguchi;T.Suzuki;ENERGY&FUELS1994～

PapersIn refereedAcademic JournalCo-authoredIKENAGA Naoki;;;;1991～

PapersIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Hirokazu Oda;Chikao Yokokawa;J. Fuel Soc. Jpn.1990/11/1～Fuel Society of Japan

PapersIn refereedAcademic JournalCo-authoredIKENAGA Naoki;Hirokazu Oda;Chikao Yokokawa;1990～

IKENAGA, Naoki

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