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Dimethyl carbonate synthesis over ZnO–CaO bi-functional catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
50153 46783 2014 5 PDF Available
Title
Dimethyl carbonate synthesis over ZnO–CaO bi-functional catalysts
Abstract

•ZnO-CaO catalyst exhibited an interesting DMC yield (41.2 %) with the Zn/Ca molar ratio of 4:1.•ZnO-CaO catalysts with suitable acidic/basic sites were beneficial for the DMC synthesis, attributing to the synergistic effect between ZnO and CaO.•A bi-functional mechanism for the DMC synthesis over ZnO-CaO catalysts was proposed.

ZnO–CaO catalysts were prepared and tested for the synthesis of dimethyl carbonate (DMC) from urea and methanol. Meaningfully, the bi-functional catalysts ZnO–CaO exhibited noticeable DMC yield (41.2%) with the Zn/Ca molar ratio of 4:1, which might ascribe to the synergistic effect between ZnO and CaO. The plausible mechanism for the DMC synthesis was as follows: urea was activated to generate metal isocyanato group on the acid sites and subsequently nucleophilic attacked by the activated methanol on the basic sites.

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Keywords
Dimethyl carbonate; Urea alcoholysis; ZnO; CaO; Heterogeneous catalyst
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Dimethyl carbonate synthesis over ZnO–CaO bi-functional catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 46, 10 February 2014, Pages 46–50
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
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