Effect of Preparation Method of Fe–based Fischer–Tropsch Catalyst on their Light Olefin Production
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Fischer–Tropsch synthesis (FTS) for the production of light olefin from syngas was investigated on K–Fe–Cu–Al catalysts. The catalysts were prepared by different methods, such as K impregnated over co-precipitated Fe–Cu–Al, K impregnated over sol–gel (pechini) synthesized Fe–Cu–Al, Fe–Cu–K impregnated on alumina and K impregnated over co-precipitated Fe–Cu in a slurry phase of Al2O3. Among four catalysts, K impregnated over Fe–Cu–Al prepared by sol–gel method has shown the best activity. A favorable pore size distribution and pore volume, manifested in a facile reducibility of the iron oxide, is found to be responsible for high activity. The catalyst also exhibits high olefin selectivity compared with the others, due to the presence of moderate number of acid sites.
KeywordsIron catalyst Fischer–Tropsch synthesis Co-precipitation Sol–gel method Impregnation
The authors would like to acknowledge funding from the Korea Ministry of Knowledge Economy (MKE) through ‘‘Project of next-generation novel technology development’’ of ITEP. P. S. Sai Prasad thanks Korea Federation of Science & Technology (KOFST) for the award of the visiting research fellowship under Brain Pool program.
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