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Structural feature and catalytic performance of Cu―SiO2―TiO2 cogelled xerogel catalysts for oxidative carbonylation of methanol to dimethyl carbonate

Paper ID Volume ID Publish Year Pages File Format Full-Text
50522 46800 2011 5 PDF Available
Title
Structural feature and catalytic performance of Cu―SiO2―TiO2 cogelled xerogel catalysts for oxidative carbonylation of methanol to dimethyl carbonate
Abstract

Cu―SiO2―TiO2 cogelled xerogel catalysts were prepared, characterized and tested for oxidative carbonylation of methanol to dimethyl carbonate (DMC). The catalyst with 12.5 mol% of Cu loading shows better catalytic performance and reduced corrosion as compared with the CuCl catalytic system, which is attributed to highly dispersed Cu+ active centers as well as lower chloride content. Further copper loading resulted in loss of copper during the preparation of the catalyst and decreased catalytic activity in DMC synthesis.

Graphical AbstractPart of the [SiO4] groups replaced by [TiO4] groups creates negative charges in the framework, which are reasonably balanced by the presence of Cu + in Cu―SiO2―TiO2 catalysts.Figure optionsDownload full-size imageDownload as PowerPoint slideResearch Highlights► Great amount of chloride was removed from the xerogel during the calcination process. ► The reductive gases released from the xerogels promote the reduction of Cu2+ species. ► Negative charges created by [TiO4] replacing [SiO4] groups are balanced by isolated Cu+ ions.

Keywords
Sol–gel process; Cogelification; Cuprous ions; Silica–titania matrix; Dimethyl carbonate
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Structural feature and catalytic performance of Cu―SiO2―TiO2 cogelled xerogel catalysts for oxidative carbonylation of methanol to dimethyl carbonate
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 12, Issue 5, 5 January 2011, Pages 357–361
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us