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Dry reforming of methane over CeO2 supported Ni, Co and Ni–Co catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
45442 46412 2015 11 PDF Available
Title
Dry reforming of methane over CeO2 supported Ni, Co and Ni–Co catalysts
Abstract

•CeO2 supported Ni, Co and Ni–Co catalysts were tested for dry reforming of methane.•Co/CeO2 catalyst exhibited much lower activity than Ni/CeO2 and Ni–Co/CeO2 catalysts.•TEM and reaction data indicate that Co/CeO2 system is more susceptible to the SMSI effect than Ni/CeO2.•The activities of ceria-based catalysts decreased with increasing calcination temperature.

Ceria supported Ni, Co monometallic and Ni–Co bimetallic catalysts were prepared by incipient wetness impregnation method, calcined at two different temperatures (700 °C and 900 °C) and tested for dry reforming of methane reaction at 700 °C. The activities of ceria-based Ni containing catalysts decreased with increasing calcination temperature accompanied by a decrease in coke deposition. While Ni/CeO2 and Ni–Co/CeO2 catalysts exhibited comparable high activities, Co/CeO2 catalysts exhibited very low activity. The lower activity of Co/CeO2 catalyst was attributed to strong metal support interaction (SMSI). The SMSI effect was confirmed with TEM images showing a layer of support coating the metal particles. The diversity of the deposited carbon structures in terms morphology (straight long filaments, highly entangled and curly shaped filaments, filaments with knuckle-like structure and carbon onions) was noted. In addition to the carbon buildup, the deactivation was observed to be due to the loss of active metals in the carbon filaments.

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Keywords
Dry reforming of methane; Ni; Co; Ni–Co; Ceria supported; Calcination temperature
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Dry reforming of methane over CeO2 supported Ni, Co and Ni–Co catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 179, December 2015, Pages 128–138
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us