Dehydrogenation of ethane with carbon dioxide over supported chromium oxide catalysts

Citation
Sb. Wang et al., Dehydrogenation of ethane with carbon dioxide over supported chromium oxide catalysts, APP CATAL A, 196(1), 2000, pp. 1-8
Citations number
20
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics","Chemical Engineering
Journal title
APPLIED CATALYSIS A-GENERAL
ISSN journal
0926-860X → ACNP
Volume
196
Issue
1
Year of publication
2000
Pages
1 - 8
Database
ISI
SICI code
0926-860X(20000327)196:1<1:DOEWCD>2.0.ZU;2-O
Abstract
The oxidative dehydrogenation of ethane into ethylene by carbon dioxide ove r an unsupported Cr2O3 and several supported Cr2O3 catalysts on metal oxide s such as Al2O3, SiO2, TiO2, and ZrO2 was investigated and the effect of su pport on the catalytic activity was studied. The unsupported Cr2O3 shows me dium catalytic activity in this reaction; the support will exert a quite di fferent effect on catalytic behavior. The catalytic activity varies with th e nature of supports. Cr2O3/SiO2 catalysts exhibit an excellent performance in this reaction. Cr2O3 loading also affects the catalytic activity; 8 wt. % Cr2O3/SiO2 catalysts can produce 55.5% ethylene yield at 61% ethane conve rsion at 650 degrees C. Characterization indicates that the distribution of chromium oxide on supports and surface chromium species structure are infl uenced by the nature of supports. The acidity/basicity and redox property o f catalysts determines the catalytic activity in the dehydrogenation of eth ane by carbon dioxide. (C) 2000 Elsevier Science B.V. All rights reserved.