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

Ay, Hale
Üner, Deniz
Ceria supported Ni, Co monometallic and Ni-Co bimetallic catalysts were prepared by incipient wetness impregnation method, calcined at two different temperatures (700 degrees C and 900 degrees C) and tested for dry reforming of methane reaction at 700 degrees 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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Citation Formats
H. Ay and D. Üner, “Dry reforming of methane over CeO2 supported Ni, Co and Ni-Co catalysts,” APPLIED CATALYSIS B-ENVIRONMENTAL, pp. 128–138, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/34477.