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Dry reforming of methane on ceria prepared by modified precipitation route

Paper ID Volume ID Publish Year Pages File Format Full-Text
39359 45820 2015 12 PDF Available
Title
Dry reforming of methane on ceria prepared by modified precipitation route
Abstract

•Ceria was prepared by modified precipitation routes.•H2O2 and/or CTAB were used as additives.•The influence on catalytic activity, stability and resistance to sintering was addressed.•H2O2 used alone or with CTAB led to ceria samples showing the best performances.

Cerium oxide catalysts for fuel cells application were synthesized via precipitation and modified precipitation routes where the effect of H2O2 and/or cetyltrimethylammonium bromide (CTAB) addition in the precipitation step has been investigated. Microstructure and reduction–reoxidation properties of the oxides were analyzed by XRD, adsorption–desorption isotherms of N2 at −196 °C, TG–DTA, Raman, SEM, TPR-H2, TPR-CH4 and TPO. The catalytic properties of CeO2 samples were investigated in dry reforming of methane (DRM) between 750 and 900 °C under both stoichiometric (CH4 and CO2 in equal amounts) and oxidizing (excess of CO2 with respect to CH4) conditions. A material exploitable for applications in catalysis and solid oxide fuel cells (SOFCs) was obtained by modifying the precipitation route via the addition of H2O2 (CeO2_H2O2). Compared to materials synthesized conventionally or by using CTAB, CeO2_H2O2 exhibited the best thermal stability, least surface loss under high temperatures operation (e.g. 900 °C), superior stability with respect to bulk redox properties when alternating between oxidizing and reducing treatments, and highest catalytic activity and resistance to deposition of graphitic carbon.

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Keywords
Ceria; Surfactant; Hydrogen peroxide; Precipitation method; Dry reforming of methane
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 494, 25 March 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
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Any Questions? feel free to contact us