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TiO2/SiO2 supported vanadia catalysts for the ODH of propane

Paper ID Volume ID Publish Year Pages File Format Full-Text
53747 46982 2015 10 PDF Available
Title
TiO2/SiO2 supported vanadia catalysts for the ODH of propane
Abstract

•Supported vanadia prepared from TiO2/SiO2 supports containing 70% and 90% TiO2.•Anatase phase on SiO2 was thermally stable up to 1123 K for the 70TiSi support.•6% vanadia on the 70TiSi support showed the best catalytic activity and selectivity.•Conversion and selectivity data were well explained by the kinetic parameters.•70% TiO2 appeared to be the optimum amount on this SiO2 support.

Supported vanadia catalysts were prepared on two TiO2/SiO2 supports, which contained 70% and 90% TiO2. The supports were thermally stable up to 1023 K and surface vanadia species were formed on them. The supported catalysts were characterized by Raman and FTIR spectroscopy, XRD and TPR. The surface area of the catalysts was also determined. The supported vanadia catalysts were active for the propane oxidative dehydrogenation (ODH) reaction and the most active and selective catalyst contained 6% vanadia, which appeared to be the monolayer limit on these supports. Furthermore, the catalyst formed with 70% TiO2 in the support was more active than the catalyst containing 90% TiO2. The kinetic parameters were determined and were able to explain the variations in conversion at iso-contact time and selectivity at iso-conversion for the different catalysts.

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Keywords
TiO2/SiO2 support; Vanadia; Loading; Propane; ODH; Kinetic parameters
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TiO2/SiO2 supported vanadia catalysts for the ODH of propane
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 254, 1 October 2015, Pages 62–71
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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Online Support
Any Questions? feel free to contact us