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Influence of method of preparation of Co-Cu/MgO catalyst on dehydrogenation/dehydration reaction pathway of 1, 4-butanediol

Paper ID Volume ID Publish Year Pages File Format Full-Text
50691 46809 2011 4 PDF Available
Title
Influence of method of preparation of Co-Cu/MgO catalyst on dehydrogenation/dehydration reaction pathway of 1, 4-butanediol
Abstract

Co-Cu/MgO catalyst was prepared by two different methods; one involving generation of Cu and Mg mixed carbonate by coprecipitation followed by mixing it with Co carbonate (Catalyst-1) and the second method involving coprecipitation of all the nitrate salts to get the mixed carbonate (Catalyst-2). Contacting 1,4-butanediol on Catalyst-1 under vapor phase yielded γ-butyrolactone via dehydrogenation, whereas, Catalyst-2 yielded tetrahydrofuran via dehydration. Higher Cu dispersion obtained by N2O pulse chemisorption due to smaller particle size in Catalyst-1 is found to be responsible for the lactonization activity. The presence of strong acid sites, as determined by NH3 TPD, in Catalyst-2 leads to tetrahydrofuran formation by dehydration of 1,4-butanediol.

Graphical AbstractMethod of preparation of Co-Cu/MgO catalyst has profound influence on the selectivity in the reaction pathway of 1,4-butanediol transformation.Figure optionsDownload full-size imageDownload as PowerPoint slideResearch Highlights► Mode of addition of Co to Cu/MgO is very crucial in deciding the catalytic activity. ► In the case of Catalyst-1, highly acid sites outplay Cu dispersion favoring dehydration. ► In the case of Catalyst-2, higher Cu dispersion favors dehydrogenation pathway.

Keywords
1,4-butanediol; γ-butyrolactone; Tetrahydrofuran; NH3 TPD; Co-Cu/MgO catalyst
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Influence of method of preparation of Co-Cu/MgO catalyst on dehydrogenation/dehydration reaction pathway of 1, 4-butanediol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 12, Issue 10, 15 May 2011, Pages 866–869
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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