Direct conversion of syngas to ethanol over Rh/Mn-supported on modified SBA-15 molecular sieves: Effect of supports |
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| Authors: | Guochang Chen Cun-Yue GuoXiaohui Zhang Zhijun Huang Guoqing Yuan |
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| Affiliation: | a Beijing National Laboratory for Molecular Sciences, Laboratory of New Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR Chinab Graduate University of Chinese Academy of Sciences, Beijing 100049, PR China |
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| Abstract: | SBA-15 molecular sieves with a tunable pore size (SBA-15-HCl, SBA-15-HPMo, SBA-15-HPW, and SBA-15-HSiW) were synthesized through adding heteropoly acids to a template and extending crystallization time. Loaded with RhCl3 and Mn(NO3)2, SBA-15-HPMo catalyzed well the direct conversion of syngas to ethanol. In the first 2 h the CO conversion over the Rh-Mn/SBA-15-HPMo catalyst was up to 100%. Average CO conversion over the SBA-15-HPMo-supported catalyst increased significantly from 4.2 to 21.9% and selectivity to ethanol from 9.3 to 12.8% compared with the amorphous silica-supported one. The enhanced redox property of the encapsulated Rh and Mn oxides within the mesoporous channels, and multi-dispersed centers formed by confined metal particles contributed to improved catalytic performances. |
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| Keywords: | Rhodium Manganese CO hydrogenation C2 oxygenates SBA-15 Syngas |
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