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Oxidative dehydrogenation of ethanol over AgLi–Al2O3 catalysts containing different phases of alumina

Paper ID Volume ID Publish Year Pages File Format Full-Text
50058 46778 2015 4 PDF Available
Title
Oxidative dehydrogenation of ethanol over AgLi–Al2O3 catalysts containing different phases of alumina
Abstract

•The mixed γ- and χ-alumina exhibits higher activity than each phase alone.•Activity depends on weak basic site, Agnδ + clusters and reduction of catalysts.•Lower activity will be observed if the reduction of Agnδ + to Ag0 occurs.•With these AgLi–Al2O3 catalysts, the selectivity to acetaldehyde can be 100%.

Oxidative dehydrogenation of ethanol over the AgLi–Al2O3 catalysts having different phase compositions of alumina was investigated. The pure gamma (CHI00), pure chi (CHI100) and equally mixed phases (CHI50) derived from the solvothermal synthesis can play important roles on the physicochemical properties of AgLi–Al2O3 catalysts. Especially, the amount of weak basic sites, the oxidation state of Ag, and the reduction behaviors of catalysts are crucial in determining the ethanol conversion and product selectivity. It was found that increased amounts of weak basic sites and Agnδ + clusters enhanced the catalytic activity as seen for the AgLi–CHI50 catalyst.

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Keywords
Oxidative dehydrogenation; Alumina; Ethanol; Silver; Lithium
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Oxidative dehydrogenation of ethanol over AgLi–Al2O3 catalysts containing different phases of alumina
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 70, 5 October 2015, Pages 49–52
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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Price after discount Only $4.95
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