258962 Syngas to Mixed Alcohols Via Zn-Mn Promoted Cu-Fe Based Catalyst

Wednesday, October 31, 2012: 9:50 AM
315 (Convention Center )
Yongwu Lu1, Fei Yu2, Jin Hu1 and Peng Zhou1, (1)Department of Agricultural & Biological Engineering, Mississippi State University, Mississippi State, MS, (2)Department of Agricultural and Biological Engineering, Mississippi State University, Starkville, MS

Mixed alcohols synthesis from syngas or biomass-derived syngas is an important process for the production of oxygenates fuels, fuel additives and other intermediates for value-added chemical feedstock such as medicine, cosmetic, lubricants, detergents, and polyester. In this paper, Zn-Mn promoted Cu-Fe based catalyst was synthesized by the co-precipitation method. Mixed alcohols synthesis from syngas was studied in a half-inch tubular reactor system after the catalyst was reduced. Zn-Mn promoted Cu-Fe based catalyst was characterized by SEM-EDS, TEM, XRD, and XPS. The liquid phase products (alcohol phase and hydrocarbon phase) were analyzed by GC–MS and the gas phase products were analyzed by GC. The results showed that Zn-Mn promoted Cu-Fe based catalyst had high catalytic activity and high alcohol selectivity. The maximal CO conversion rate was 72%, and the yield of alcohol and hydrocarbons were also very high. Cu (111) was the active site for mixed alcohols synthesis, Fe2C (101) was the active site for olefin and paraffin synthesis. The reaction mechanism of mixed alcohols synthesis from syngas over Zn-Mn promoted Cu-Fe based catalyst was proposed. Zn-Mn promoted Cu-Fe based catalyst can be regarded as a potential candidate for catalytic conversion of biomass-derived syngas to mixed alcohols.

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