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New rutile Ga/V/Nb/Sb mixed oxides as catalysts for propane ammoxidation to acrylonitrile

Paper ID Volume ID Publish Year Pages File Format Full-Text
55157 47042 2012 8 PDF Available
Title
New rutile Ga/V/Nb/Sb mixed oxides as catalysts for propane ammoxidation to acrylonitrile
Abstract

Here we report on the chemical–physical characteristics and reactivity in propane ammoxidation to acrylonitrile of a new class of rutile-type, GaSbO4-based multicomponent oxides. The GaSbO4 rutile was much less active than the conventional VSbO4-based rutile systems, but showed a good selectivity to acrylonitrile. The incorporation of V in GaSbO4 allowed for an improvement in catalytic activity, but with decreased maximum selectivity to acrylonitrile. However, the further incorporation of Nb (thereby developing a Ga/V/Nb/Sb mixed oxide) led to a mixed oxide that presented an enhanced catalytic behavior, combining both high activity and high selectivity to acrylonitrile. The Nb presence also greatly improved the stability of the catalytic system, hindering the crystallization phenomena observed with rutile Ga/V/Sb/O systems.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (169 K)Download as PowerPoint slideHighlights► Rutile GaSbO4 systems are the basis for the preparation of multicomponent oxides. ► Rutile Ga/V/Sb/Nb mixed oxides are active in propane ammoxidation to acrylonitrile. ► The presence of V in Ga/V/Sb/Nb mixed oxides increases catalyst activity. ► The presence of Nb in Ga/V/Sb/Nb mixed oxides increases selectivity to acrylonitrile. ► An additional role of Nb is to stabilize the morphology of the microcrystalline rutile oxide.

Keywords
Propane ammoxidation; Acrylonitrile; Rutile; Gallium vanadium antimony niobium mixed oxide
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New rutile Ga/V/Nb/Sb mixed oxides as catalysts for propane ammoxidation to acrylonitrile
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 192, Issue 1, 30 September 2012, Pages 72–79
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