Insights into Promoting Effect of Sm on Catalytic Performance of the CeO2/Beta Catalyst in Direct Conversion of Bioethanol to Propylene

doi:10.1007/s40242-022-2128-4

Chemical Research in Chinese Universities ›› 2022, Vol. 38 ›› Issue (6): 1547-1552.doi: 10.1007/s40242-022-2128-4

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Insights into Promoting Effect of Sm on Catalytic Performance of the CeO₂/Beta Catalyst in Direct Conversion of Bioethanol to Propylene

JIN Huan¹, XU Ding², TIAN Chao¹, YUE Yinghong¹, HUA Weiming¹, GAO Zi¹

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

Received:2022-04-07 Online:2022-12-01 Published:2022-12-06
Contact: HUA Weiming E-mail:wmhua@fudan.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (Nos.22072027, 91645201), the Project of the Science and Technology Commission of Shanghai Municipality, China(No.19DZ2270100) and the Project of the Shanghai Research Institute of Petrochemical Technology SINOPEC (No.33750000-19-ZC0607-0005).

Abstract

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.

Key words: Bioethanol, Renewable propylene, Sm-CeO₂/Beta composite, Sm doping

JIN Huan, XU Ding, TIAN Chao, YUE Yinghong, HUA Weiming, GAO Zi. Insights into Promoting Effect of Sm on Catalytic Performance of the CeO₂/Beta Catalyst in Direct Conversion of Bioethanol to Propylene[J]. Chemical Research in Chinese Universities, 2022, 38(6): 1547-1552.

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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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