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Effect of sulfate addition on the performance of Co/Al2O3 catalysts in catalytic dehydrogenation of propane

Paper ID Volume ID Publish Year Pages File Format Full-Text
49465 46746 2015 4 PDF Available
Title
Effect of sulfate addition on the performance of Co/Al2O3 catalysts in catalytic dehydrogenation of propane
Abstract

•Sulfate addition to Co/Al2O3 catalysts obviously promotes propane dehydrogenation.•Sulfate species inhibits the reduction to metallic Co species.•Sulfate species enhances C–H bond activation and scission.•Loss of sulfate species and cobalt species causes the irreversible deactivation.

The effect of sulfate species in propane dehydrogenation over Co/Al2O3 catalysts was studied. On the one hand, the interaction between SO42− and cobalt species leads to better dispersed cobalt oxide and restrains the reduction to metallic Co species, thereby inhibiting cracking reaction. On the other hand, the initial C–H bond activation and scission are facilitated on the electron-deficient cobalt and sulfate sites, resulting in dramatically improved dehydrogenation performance. XPS, MS and XRD results show that the reduction of sulfate species to SO2 and consequently the loss of active cobalt species contribute to the irreversible deactivation of catalyst.

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Keywords
Metallic Co species; Cracking; Dispersion; Electronic effect; Propylene; SO2
First Page Preview
Effect of sulfate addition on the performance of Co/Al2O3 catalysts in catalytic dehydrogenation of propane
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 60, 5 February 2015, Pages 42–45
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis