Effect of additive on CuO-ZnO/SBA-15 catalytic performance of CO2 hydrogenation to methanol

被引：0
|
作者：
Lin M. [1 ,2 ]
Na W. [1 ,3 ]
Ye H.-C. [1 ,3 ]
Huo H.-H. [1 ,3 ]
Gao W.-G. [1 ,3 ]
机构：
[1] State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming
[2] Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming
[3] Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming
来源：
Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2019年 / 47卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Alkaline sites; Methanol; Molecular sieve SBA-15; Oxygen vacancy;
D O I：
10.1016/s1872-5813(19)30048-9
中图分类号：
学科分类号：
摘要：
Three kinds of porous catalysts CuO-ZnO/SBA-15 (CZ/SBA-15), CuO-ZnO-MnO2/SBA-15 (CZM/SBA-15) and CuO-ZnO-ZrO2/SBA-15 (CZZ/SBA-15) were synthesized by impregnation method with a siliceous framework mesoporous molecular sieve SBA-15. The performance of all catalysts for catalytic hydrogenation of CO2 to methanol was evaluated on a fixed bed reactor, combined with N2 adsorption-desorption (BET), X-ray diffraction (XRD), H2 temperature-programmed reduction (H2-TPR), temperature programmed desorption (H2-TPD, CO2-TPD), N2O titration, X-ray photoelectron spectroscopy (XPS) and transmission electron microscope (TEM). The results show that the introduction of metal oxide in the catalyst changes the pore size and specific surface area of the SBA-15 molecular sieve support. The CuO-ZnO-MnO2/SBA-15 and CuO-ZnO-ZrO2/SBA-15 have high copper dispersion (DCu%), large specific surface area (SCu), small surface CuO particle size, and easy to be reduced. Compared with the Mn-O cluster, the Zr-O cluster enhances the basic site and improves the methanol selectivity. In addition, CuO-ZnO-ZrO2/SBA-15 has the highest oxygen vacancy concentration and better catalytic activity among three catalysts. The methanol selectivity of CuO-ZnO-ZrO2/SBA-15 is 25.02%, which is 28% and 136.9% higher than those of CuO-ZnO/SBA-15 and CuO-ZnO-MnO2/SBA-15, respectively. © 2019, Science Press. All right reserved.
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页码：1214 / 1225
页数：11
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