An efficient and stable Cu/SiO2 catalyst for the syntheses of ethylene glycol and methanol via chemoselective hydrogenation of ethylene carbonate

doi:10.1016/S1872-2067(18)63032-3

	An efficient and stable Cu/SiO2 catalyst for the syntheses of ethylene glycol and methanol via chemoselective hydrogenation of ethylene carbonate
	Liu, Jiaju; He, Peng; Wang, Liguo; Liu, Hui; Cao, Yan; Li, Huiquan
	2018
会议日期	JUL 17-21, 2017
会议地点	Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai, PEOPLES R CHINA
关键词	Ethylene carbonate DIMETHYL OXALATE Hydrogenation CO2 HYDROGENATION beta-Cyclodextrin HETEROGENEOUS HYDROGENATION Cu/SiO2 SELECTIVE HYDROGENATION Methanol STRUCTURAL EVOLUTION Ethylene glycol CYCLIC CARBONATES PERFORMANCE ETHANOL MOLECULES ECONOMY
卷号	39
DOI	10.1016/S1872-2067(18)63032-3
页码	1283 ; 1293
英文摘要	The efficient synthesis of methanol and ethylene glycol via the chemoselective hydrogenation of ethylene carbonate (EC) is important for the sustainable utilization of CO2 to produce commodity chemicals and fuels. In this work, a series of P-cyclodextrin-modified Cu/SiO2 catalysts were prepared by ammonia evaporation method for the selective hydrogenation of EC to co-produce methanol and ethylene glycol. The structure and physicochemical properties of the catalysts were characterized in detail by N-2 physisorption, XRD, N2O titration, H-2-TPR, TEM, and XPS/XAES. Compared with the unmodified 25Cu/SiO2 catalyst, the involvement of beta-cyclodextrin in 5 beta-25Cu/SiO2 could remarkably increase the catalytic activity-excellent activity of 1178 mg(Ec) g(cat) h(-1) with 98.8% ethylene glycol selectivity, and 71.6% methanol selectivity could be achieved at 453 K. The remarkably improved recyclability was primarily attributed to the remaining proportion of Cu+/(Cu-0+Cu+). Furthermore, the DFT calculation results demonstrated that metallic Cu dissociated adsorbed Hz, while Cu' activated the carbonyl group of EC and stabilized the intermediates. This study is a facile and efficient method to prepare highly dispersed Cu catalysts this is also an effective and stable heterogeneous catalyst system for the sustainable synthesis of ethylene glycol and methanol via indirect chemical utilization of CO2. (C) 2018, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
源文献作者	ShanghaiTech Univ
会议录	Article; Proceedings Paper
WOS记录号	WOS:000441480500003
内容类型	会议论文
源URL	[http://ir.ipe.ac.cn/handle/122111/28951]
专题	中国科学院过程工程研究所
推荐引用方式 GB/T 7714	Liu, Jiaju,He, Peng,Wang, Liguo,et al. An efficient and stable Cu/SiO2 catalyst for the syntheses of ethylene glycol and methanol via chemoselective hydrogenation of ethylene carbonate[C]. 见:. Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai, PEOPLES R CHINA. JUL 17-21, 2017.