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Dielectric barrier discharge plasma for preparation of Ni-based catalysts with enhanced coke resistance: Current status and perspective

Paper ID Volume ID Publish Year Pages File Format Full-Text
53942 46990 2015 12 PDF Available
Title
Dielectric barrier discharge plasma for preparation of Ni-based catalysts with enhanced coke resistance: Current status and perspective
Abstract

•Dielectric barrier discharge plasma is used to design Ni-based catalysts.•Ni structure is crucial to the catalytic decomposition rate and carbon formation.•The plasma prepared Ni catalysts showed enhanced coke resistant property.•Carbon structure is studied by temperature programmed surface reaction.

Ni-based catalysts show high activity for steam or CO2 reforming of methane, partial oxidation of methane, and CO or CO2 methanation. However, a challenge that Ni catalysts are facing is the high thermodynamic potential for carbon deposition, derived from CO disproportionation or CH4 decomposition. Coke deposition causes reactor blockage, and the formed carbon filaments lead to the deformation of the catalyst. Encapsulating carbon quickly induces the deactivation of Ni catalysts. In this perspective, the preparation methods for the Ni catalysts were studied by dielectric barrier discharge (DBD) plasma and thermal decomposition. The DBD plasma decomposition method and the mechanism for the preparation of the catalysts were introduced. Different Ni structures were produced by different preparation methods. The geometric structure over the Ni catalysts played an important role on carbon deposition rate and carbon morphology. DBD plasma decomposed Ni catalysts possessed improved coke resistance. The reactivity of the carbon was studied toward temperature programmed surface reaction. This perspective provides the understanding of Ni-based catalysts with coke resistance and gives the relationship of Ni structure and carbon formation.

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Keywords
CO disproportionation; Plasma; Ni; Catalyst; Methane; Coke resistance
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Dielectric barrier discharge plasma for preparation of Ni-based catalysts with enhanced coke resistance: Current status and perspective
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 256, Part 1, 1 November 2015, Pages 29–40
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