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Cobalt molybdenum carbides: Surface properties and reactivity for methane decomposition

Paper ID Volume ID Publish Year Pages File Format Full-Text
44458 46030 2007 9 PDF Available
Title
Cobalt molybdenum carbides: Surface properties and reactivity for methane decomposition
Abstract

The methane decomposition over cobalt molybdenum catalysts (CoMo100-x; x = 0, 25, 50, and 75) carburized at temperatures of 700–973 K was performed using a microreactor at 973 K. The active species for the production of hydrogen during the methane decomposition was studied on the basis of XRD, TPC, TPR, and XPS. The Co50Mo50C-800 catalyst exhibits a higher conversion and hydrogen production rate compared to the Mo100C-, Co25Mo75C-, and Co75Mo25C-800 catalysts. The XRD measurement showed the presence of β-Mo2C and cobalt molybdenum oxycarbides in the catalyst before and after 6-h reaction. Cobalt molybdenum carburized at 800 K produced a surface oxycarbide based on the formation of H2O during the TPC and production of CH4 and H2O during the TPR. The active species of the cobalt molybdenum carbide catalyst for the CH4 decomposition was the cobalt molybdenum oxycarbide (Co1.0Mo5.6C0.3O0.7 by XPS analysis) on the surface that was formed during the carburization. The catalyst also exhibited a longer lifetime during methane decomposition.

Graphical abstractThe methane decomposition over cobalt molybdenum catalysts carburized at temperatures of 700–973 K was performed using a microreactor at 973 K. The Co50Mo50C-800 catalyst exhibits a higher conversion and hydrogen production rate. The active species of the cobalt molybdenum carbide catalyst for the CH4 decomposition was the cobalt molybdenum oxycarbide (Co1.0Mo5.6C0.3O0.7 by XPS analysis) on the surface that was formed during the carburization.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Co-Mo; Carbide; Methane decomposition; TPC; XRD; TPR; XPS
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Cobalt molybdenum carbides: Surface properties and reactivity for methane decomposition
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 317, Issue 1, 27 January 2007, Pages 82–90
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
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Any Questions? feel free to contact us