Insights into Promoting Effect of Sm on Catalytic Performance of the CeO2/Beta Catalyst in Direct Conversion of Bioethanol to Propylene |
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| Authors: | JIN Huan XU Ding TIAN Chao YUE Yinghong HUA Weiming GAO Zi |
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| Institution: | 1. Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200438, P. R. China;2. Shanghai Customs Technology Center of Inspection and Test, Shanghai 200120, P. R. China |
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| Abstract: | Aseries of Sm-doped CeO2/Beta composite catalysts with various Sm/Ce atomic ratios(0.1-0.4) was prepared by an incipient impregnation method, followed by calcination at 650 oC. They were characterized by X-ray diffraction(XRD), N2 adsorption, X-ray photoelectron spectroscopy(XPS), Raman, NH3-temperature programmed desorption(TPD) and CO2-TPD. The incorporation of Sm into CeO2/Beta increases obviously the propylene yield for the selective conversion of ethanol to propylene. The promoting effect of Sm on CeO2/Beta can be attributed to two reasons. One is more acetone intermediates are generated on the Sm-doped catalysts due to the enhanced formation of oxygen vacancies. The other is the conversion of acetone intermediate to propylene is enhanced owing to weaker and fewer acid sites on the Sm-doped catalysts. |
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| Keywords: | Bioethanol Renewable propylene Sm-CeO2/Beta composite Sm doping |
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