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A comparison study on the partial oxidation of n-butane and propane over VPO catalysts supported on SBA-15, MCM-41, and fumed SiO2

Paper ID Volume ID Publish Year Pages File Format Full-Text
44386 46024 2006 9 PDF Available
Title
A comparison study on the partial oxidation of n-butane and propane over VPO catalysts supported on SBA-15, MCM-41, and fumed SiO2
Abstract

A desorption–precipitation method was used to prepare VPO catalysts supported on SBA-15, MCM-41, and fumed SiO2 for the partial oxidation of n-butane and propane. Techniques such as N2 adsorption–desorption measurements, XRD, XPS, Raman, and H2-TPR were adopted to explore the nature of the catalysts as well as the characters of the supported VPO species. For all the samples, the VPO components were present predominantly in the form of well-crystallized (VO)2P2O7 phase, and the VOPO4-like phases were absent. The interaction between VPO and support was significant for the samples activated under n-butane/air but not so much for those activated in the atmosphere of water vapor/propane/air. Hence, the key factors that influenced the catalytic activity in n-butane and propane oxidation should be VPO-support interaction and VPO dispersion. Generally speaking, the VPO catalysts supported on the three silica-based materials showed fairly good performance for n-butane oxidation (i.e. high in butane conversion and MA selectivity). The three catalysts are less active for propane oxidation but show fairly good selectivity to propylene and acid products at low propane conversion. The discrepancies in the reaction behavior suggest that VPO-type catalysts are rather structure specific towards the reactant molecules.

Keywords
Supported VPO; Partial oxidation; n-Butane; Propane; SBA-15; MCM-41; Fumed SiO2
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A comparison study on the partial oxidation of n-butane and propane over VPO catalysts supported on SBA-15, MCM-41, and fumed SiO2
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 306, 7 June 2006, Pages 8–16
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