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Total oxidation of propane in vanadia-promoted platinum-alumina catalysts: Influence of the order of impregnation

Paper ID Volume ID Publish Year Pages File Format Full-Text
53741 46982 2015 9 PDF Available
Title
Total oxidation of propane in vanadia-promoted platinum-alumina catalysts: Influence of the order of impregnation
Abstract

•V promoted Pt/alumina was tested for propane combustion.•The addition of V to Pt/alumina enhances catalytic activity.•Coimpregnated VPt catalyst was the most efficient.•Activity related to reducibility and to the modification of lattice parameter of Pt.

Differently prepared vanadium promoted Pt/alumina catalysts have been prepared, characterized and tested for propane total oxidation. V-promoted Pt/Al2O3 catalysts have shown remarkably higher catalytic activity than V-free Pt/Al2O3 catalyst. Among V-promoted Pt catalysts that prepared by coimpregnation gave the highest alkane conversions in the whole range of reaction temperatures studied. Factors such as Pt particle size or the oxidation state of platinum do not seem to be the responsible for the enhanced performance. Modification of the redox properties of the catalyst (i.e. high reducibility of vanadium species) likely provoked by the close contact between platinum particles and vanadium species and the partial introduction of vanadium in the platinum particles can be related to the improved reactivity of the PtV catalysts.

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Keywords
VOC oxidation; Platinum; Vanadium; Preparation method
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Total oxidation of propane in vanadia-promoted platinum-alumina catalysts: Influence of the order of impregnation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 254, 1 October 2015, Pages 12–20
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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