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dc.contributor.authorYouzhu Yuan
dc.contributor.author袁友株
dc.contributor.authorWei Cao
dc.contributor.authorWeizheng Weng
dc.contributor.author翁维正
dc.date.accessioned2011-12-10T11:43:39Z
dc.date.available2011-12-10T11:43:39Z
dc.date.issued2004-10
dc.identifier.citationJOURNAL OF CATALYSIS,2004,228(2):311-320zh_CN
dc.identifier.issn0021-9517
dc.identifier.urihttp://dx.doi.org/doi:10.1016/j.jcat.2004.09.003
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/11362
dc.description.abstractAmino-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.zh_CN
dc.language.isoenzh_CN
dc.publisherACADEMIC PRESS INC ELSEVIER SCIENCEzh_CN
dc.subjectMCM-41zh_CN
dc.subjectMCM-48zh_CN
dc.subjectamino-functionalizationzh_CN
dc.subjectcopper catalystzh_CN
dc.subjectmethanolzh_CN
dc.subjectoxy-carbonylationzh_CN
dc.subjectdimethylcarbonatezh_CN
dc.titleCuCl2 immobilized on amino-functionalized MCM-41 and MCM-48 and their catalytic performance toward the vapor-phase oxy-carbonylation of methanol to dimethylcarbonatezh_CN
dc.typeArticlezh_CN


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