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Catalytic growth of silicon carbide composite with nanoscopic properties and enhanced oxidative resistance as catalyst support

Paper ID Volume ID Publish Year Pages File Format Full-Text
41967 45906 2010 10 PDF Available
Title
Catalytic growth of silicon carbide composite with nanoscopic properties and enhanced oxidative resistance as catalyst support
Abstract

Resistance to oxidation is a major point in catalysis processes when it comes to the properties of catalyst supports that are exposed to harsh conditions such as high temperature and non-negligible concentration of oxidative agents. Indeed, consistent oxidation often leads to the destruction of the support and loss of the catalyst material. Silicon carbide (SiC) has already proved to be very resistant to oxidation below 700 °C, but some applications (such as steam methane reforming) require higher oxidative resistance. In this work, we report the synthesis of a new SiC composite made of a β-SiC host structure covered with SiC nanofibres which exhibits a significant improved oxidative resistance. Such increase of the oxidative resistance was explained by a defect-site inhibition mechanism induced by the presence of SiC nanofibres that was checked with and without the presence of an oxidative catalyst.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (105 K)Download as PowerPoint slideResearch highlights▶ SiC nanofibres with homogeneous diameter exhibit strong anchorage on the SiC host. ▶ The SiC–NF/SiC composite shows a higher oxidative resistance than that of pristine SiC. ▶ The curvature of the cylindrical SiC nanofibres prevents them from further oxidation. ▶ The self-oxidation inhibition of the SiC host also explains the composite resistance. ▶ Results suggest potential in steam reforming and automotive exhaust gas treatment.

Keywords
Silicon carbide; Oxidative resistance; Nanofibres; Catalyst support; Composite
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Catalytic growth of silicon carbide composite with nanoscopic properties and enhanced oxidative resistance as catalyst support
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 385, Issues 1–2, 15 September 2010, Pages 52–61
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