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Oxidative dehydrogenation of ethane to ethylene over Mo-incorporated mesoporous SBA-16 catalysts: The effect of MoOx dispersion

Paper ID Volume ID Publish Year Pages File Format Full-Text
39019 45801 2016 14 PDF Available
Title
Oxidative dehydrogenation of ethane to ethylene over Mo-incorporated mesoporous SBA-16 catalysts: The effect of MoOx dispersion
Abstract

•Mo-incorporated SBA-16 catalysts with high loading of Mo have been successfully synthesized and investigated for catalytic ODH of ethane to ethylene.•Mo-incorporated into the framework of SBA-16 by direct synthesis method results in the formation of highly dispersed and isolated framework MoOx species.•The selectivity to ethylene over Mo-SBA-16 and Mo/SBA-16 catalysts strongly depends on the subsistent state and dispersion of MoOx species.•Mo-SBA-16 catalysts exhibit superior catalytic performance for ODH of ethane to ethylene compared with Mo-SBA-15 samples.

A series of highly dispersed Mo-incorporated mesoporous SBA-16 catalysts (Mo-SBA-16) were successfully synthesized by one-step hydrothermal method. The effects of different Mo loadings and MoOx structure of the Mo-SBA-16 catalysts for the oxidative dehydrogenation of ethane (ODHE) were investigated. Framework-incorporation promotes a better dispersion of molybdenum oxo species. Different kinds of MoOx species are related to the activity and selectivity of ethylene for ODH of ethane. A small amount of Mo species was incorporated into the framework of SBA-16, which greatly increased the selectivity of ethylene, but the C2H6 conversion was slightly greater than that of Mo/SBA-16 catalysts. Meanwhile, for both Mo-SBA-16 and Mo/SBA-16 catalysts the selectivity of ethylene was significantly enhanced with the increasing of reaction temperature. Moreover, Mo-SBA-16 catalysts showed much higher selectivities of ethylene than Mo/SBA-16 ones, mainly due to the presence of isolated MoOx species in the framework of SBA-16. And the maximal selectivity to C2H4 of 75.7% was obtained over 0.05Mo-SBA-16 catalyst. The three-dimensional mesoporous channels of Mo-SBA-16 allowed a better diffusion of ethane and produced ethylene to improve the catalytic performance.

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Keywords
Highly dispersed MoOx species; Ethane oxidative dehydrogenation; Framework-incorporated molybdena species; Mo-SBA-16 catalysts
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Oxidative dehydrogenation of ethane to ethylene over Mo-incorporated mesoporous SBA-16 catalysts: The effect of MoOx dispersion
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 510, 25 January 2016, Pages 84–97
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