Insights into Promoting Effect of Sm on Catalytic Performance of the CeO_(2)/Beta Catalyst in Direct Conversion of Bioethanol to Propylene  

作　　者：JIN Huan XU Ding TIAN Chao YUE Yinghong HUA Weiming GAO Zi 

机构地区：[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

出　　处：《Chemical Research in Chinese Universities》2022年第6期1547-1552,共6页高等学校化学研究（英文版）

基　　金：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);the Project of the Shanghai Research Institute of Petrochemical Technology SINOPEC (No.33750000-19-ZC0607-0005).

摘　　要：A series of Sm-doped CeO_(2)/Beta composite catalysts with various Sm/Ce atomic ratios(0.1–0.4) were prepared by an incipient impregnation method, followed by calcination at 650 ℃. They were characterized by X-ray diffraction(XRD), N2 adsorption, X-ray photoelectron spectroscopy(XPS), Raman, NH3-temperature programmed desorption(TPD) and CO_(2)-TPD. The incorporation of Sm into CeO_(2)/Beta increases obviously the propylene yield for the selective conversion of ethanol to propylene. The promoting effect of Sm on CeO_(2)/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.

关 键 词：BIOETHANOL Renewable propylene Sm-CeO_(2)/Beta composite Sm doping 

分 类 号：O64[理学—物理化学]