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Titolo:
Partial oxidation of ethane into acetaldehyde and acrolein by oxygen over silica-supported bismuth catalysts
Autore:
Zhao, Z; Kobayashi, T;
Indirizzi:
AIST, MITI, Osaka Natl Res Inst, Dept Energy & Environm, Ikeda, Osaka 5638577, Japan AIST Ikeda Osaka Japan 5638577 gy & Environm, Ikeda, Osaka 5638577, Japan Res Inst Innovat Technol Earth, Kyoto 6190292, Japan Res Inst Innovat Technol Earth Kyoto Japan 6190292 Kyoto 6190292, Japan
Titolo Testata:
APPLIED CATALYSIS A-GENERAL
fascicolo: 1-2, volume: 207, anno: 2001,
pagine: 139 - 149
SICI:
0926-860X(20010201)207:1-2<139:POOEIA>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
METAL-OXIDE CATALYSTS; SELECTIVE OXIDATION; MOLYBDATE CATALYSTS; VANADIUM-OXIDES; N-BUTANE; PROPANE; DEHYDROGENATION; FE/SIO2; PHASE; CONDENSATION;
Keywords:
partial oxidation of ethane; silica-supported bismuth; dispersion; loading amount; acetaldehyde; acrolein; oxygen; isolated bismuth species;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Kobayashi, T AIST, MITI, Osaka Natl Res Inst, Dept Energy & Environm, 1-8-31 Midorioka,Ikeda, Osaka 5638577, Japan AIST 1-8-31 Midorioka Ikeda Osaka Japan 5638577 638577, Japan
Citazione:
Z. Zhao e T. Kobayashi, "Partial oxidation of ethane into acetaldehyde and acrolein by oxygen over silica-supported bismuth catalysts", APP CATAL A, 207(1-2), 2001, pp. 139-149

Abstract

Selective oxidation of ethane by oxygen was examined over silica catalystssupporting cesium and bismuth. Aldehydes of C1-C3 were obtained with totalselectivity of about 40% at ethane conversion lower than 5%. The catalyticperformance was strongly dependent upon the bismuth loading on the catalysts. The higher turn-over-rate and the higher selectivity to aldehydes were observed at the Bi loadings lower than 0.5%. Characterization of the catalysts showed that isolated or highly dispersed Bi on the catalyst surface wasindispensable for the high aldehyde yield. Cesium also plays an important role for the high ethane reactivity and the high aldehyde selectivity. A reaction pathway was proposed in which ethane is oxidized into acetaldehyde, but not through ethylene, and acrolein is formed through a cross-condensation of acetaldehyde and formaldehyde. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 29/05/20 alle ore 04:09:38