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Oxidation of alkanes into olefins on the polyoxide catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
53658 46978 2015 11 PDF Available
Title
Oxidation of alkanes into olefins on the polyoxide catalysts
Abstract

•The results of ODE on supported salts of the Si-Mo HPC to ethylene have been presented.•Addition of water vapor into reaction mixture promotes ODE process and inhibits complete oxidation.•Supporting of Si-Mo HPC on aluminosilicate does not destroy Keggin structure but increases its stability.•Reduction of HPA in methane or hydrogen atmosphere is different.

Catalysts based on Si-Mo heteropoly compounds (HPC) supported on carriers were investigated in oxidative dehydrogenation of ethane (ODE) to ethylene. Determination of the effect of reaction parameters and the nature of catalyst on composition and distribution of products was carried out. The optimal reaction conditions: C2H6 – 20.0%, O2 – 2.5%, N2 – 57.5%, H2O – 20.0%, space velocity – 8000 h−1, contact time – 0.45 s were installed. Ethylene yields exceeding 42% with selectivity above 87% were obtained over novel Pb-Si-Mo heteropoly compound catalysts under oxidative dehydrogenation of ethane at 1023 K. Water vapor in the composition of reaction mixture increases the yield and selectivity of ODE products. Supporting of Si-Mo HPC on aluminosilicate does not destroy the Keggin molecular structure and increases its thermal stability. Reduction of heteropoly acid (HPA) molecule in methane atmosphere is different from the reduction in hydrogen atmosphere.

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Keywords
Ethane; Ethylene; Catalyst; Heteropoly compounds; Oxidative dehydrogenation
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Oxidation of alkanes into olefins on the polyoxide catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 256, Part 2, 1 November 2015, Pages 276–286
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
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