QQ客服 官方微博 反馈留言

	CuCl2 immobilized on amino-functionalized MCM-41 and MCM-48 and their catalytic performance toward the vapor-phase oxy-carbonylation of methanol to dimethylcarbonate
	Youzhu Yuan ; Yuan YZ(袁友株) ; Wei Cao ; Weizheng Weng ; Weng WZ(翁维正)
	2004-10
关键词	MCM-41 MCM-48 amino-functionalization copper catalyst methanol oxy-carbonylation dimethylcarbonate
英文摘要	Amino-functionalized MCM-41 and MCM-48 mesoporous silicas were used to immobilize CuCl2 for the vapor-pbase oxy-carbonylation of methanol to produce DMC. Higher reaction rates and better catalytic stability were obtained with CuCl2 supported onto amino-functionalized MCM-41 and MCM-48 in the DMC yield in comparison with those with CuCl2 supported on nonfunctionalized mesoporous silicas under identical conditions. The best DMC yield was obtained with a CuCl2 loading of about 10 wt%, which corresponds to the N/Cu atomic ratios of 1.5 and 2.4 in the CuCl2/1N-MCM-41 and CuCl2/2N-MCM-41, respectively. Characterizations with XRD, N-2 adsorption, XPS, and HRTEM revealed that the regular hexagonal/cubic arrays in MCM-41 and MCM-48 were retained after the amino-functionalization and the immobilization Of CuCl2 with a loading weight lower than 20 wt%. The Cu species in the catalysts with loadings lower than 10 wt% were mainly located and finely dispersed in the mesopores of amino-functionalized MCM-41 and MCM-48 through a coordinative complexation with the amino groups, forming (N)(2) - Cu2+ complex species. The better performance of CuCl2 on amino-functionalized MCM-41 and MCM-48 for the DMC production via vapor-phase oxy-carbonylation of methanol may be ascribed to the high dispersion of active sites at regular mesopores, in addition to the accelerated redox process of Cu2+/Cu+ in the complex species. (C) 2004 Elsevier Inc. All rights reserved.
语种	英语
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE
内容类型	期刊论文
源URL	[http://dx.doi.org/doi:10.1016/j.jcat.2004.09.003]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Youzhu Yuan,Yuan YZ,Wei Cao,et al. CuCl2 immobilized on amino-functionalized MCM-41 and MCM-48 and their catalytic performance toward the vapor-phase oxy-carbonylation of methanol to dimethylcarbonate[J],2004.
APA	Youzhu Yuan,袁友株,Wei Cao,Weizheng Weng,&翁维正.(2004).CuCl2 immobilized on amino-functionalized MCM-41 and MCM-48 and their catalytic performance toward the vapor-phase oxy-carbonylation of methanol to dimethylcarbonate..
MLA	Youzhu Yuan,et al."CuCl2 immobilized on amino-functionalized MCM-41 and MCM-48 and their catalytic performance toward the vapor-phase oxy-carbonylation of methanol to dimethylcarbonate".(2004).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。