Journal
CATALYSIS COMMUNICATIONS
Volume 7, Issue 9, Pages 633-638Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2006.02.005
Keywords
Cr/TS-1; ethane; ethylene; CO2; dehydrogenation
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A series of chromium catalysts supported on titanosilicate-1 (TS-1) molecular sieves with different n(Si)/n(Ti) ratios prepared by impregnation method have been tested for the dehydrogenation of ethane with carbon dioxide between 450 and 650 degrees C. The results showed that Cr/TS-1 (n(Si)/n(Ti) = 30) catalyst effectively dehydrogenated ethane to ethylene in the presence of carbon dioxide at 650 degrees C, giving 47.4% ethylene yield with a selectivity of 90.0%. The catalytic activity, observed at temperatures as low as 450 degrees C can be well explained on the basis of the existence of reducible chromium species. Moreover, the catalytic stability and regeneration performance of the Cr/TS-1 (n(Si)/n(Ti) = 30) catalyst were also investigated. (c) 2006 Elsevier B.V. All rights reserved.
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