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Intrinsic kinetics of reoxidation reaction for a multicomponent molybdate catalyst by thermal analysis method

Paper ID Volume ID Publish Year Pages File Format Full-Text
51534 46846 2009 4 PDF Available
Title
Intrinsic kinetics of reoxidation reaction for a multicomponent molybdate catalyst by thermal analysis method
Abstract

The reoxidation of a multicomponent molybdate catalyst is studied by thermal analysis method along with X-ray photoelectron spectroscopy (XPS). It is found that the reoxidation of the catalyst is mainly attributed to the replenishment of lattice oxygen combined with Mo. Further, the intrinsic kinetic model of this reaction is obtained by Kissinger–Akahira–Sunose isoconversional and master-plot method. The activation energy and pre-exponential factor (lnA) are 140.01 ± 11.10 kJ mol−1 and 21.527 ± 0.076 min−1, respectively. The kinetic model is best expressed by Avrami–Erofeyev equation, i.e., g(α) = [−ln(1 − α)]1/(0.922 ± 0.026), suggesting a nucleation and growth mechanism.

Keywords
Reoxidation; Intrinsic kinetics; Thermal analysis; Multicomponent molybdate catalyst
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Intrinsic kinetics of reoxidation reaction for a multicomponent molybdate catalyst by thermal analysis method
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 10, Issue 7, 10 March 2009, Pages 1066–1069
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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