Journal
ENERGY & FUELS
Volume 22, Issue 6, Pages 3631-3638Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ef800567v
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Funding
- National Natural Science Foundation of China [20473009]
- National Basic Research Program of China [2005CB221405]
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The oxidative dehydrogenation (ODH) of ethane with CO2 was successfully carried out over the Cr-based monolithic catalysts, which were prepared using FeCrAl alloy foil as support. High catalytic activity and stability can be drawn on these monolithic catalysts. For example, 66.5% ethane conversion and 99.5% ethylene selectivity can be achieved on the 5.0% Cr loading monolithic catalyst at 750 degrees C. After 1130 h of stability reaction, the hexagonal mesoporous structure of SBA-15 was still present and the pore walls of SBA-15 prevented the aggregation of Cr species. It was proposed that the Cr6+ species were responsible for the high catalytic activity of monolithic catalysts. During the reaction, the reduction-oxidation cycle between Cr6+ and Cr3+ species can be carried out via the dehydrogenation of ethane and oxidation by CO2 processes. Interactions between Cr, SBA-15, and the Al2O3/FeCrAl support modify the redox properties of the Cr/SBA-15/Al2O3/FeCrAl catalysts.
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