A comparison of Ni/SiC and Ni/Al2O3 catalyzed total methanation for production of synthetic natural gas

Authors:  Guoquan Zhang, Tianjun Sun, Jiaxi Peng, Sheng Wang, Shudong Wang

Abstract:
Ni/SiC and Ni/Al₂O₃ catalysts were prepared by impregnation method for total methanation. The 120 h stability tests ofthe catalysts were conducted at 500^◦C and 3 MPa with a syngas of H₂/CO = 3. The catalysts before and after reaction were characterized by N₂ adsorption–desorption, H2-TPR, XRD, TPO, TG-DSC, SEM, and TEM. The results show that the Ni/SiC catalyst is more stable than the Ni/Al₂O₃ catalyst. Compared to the Ni/Al₂O₃ counterpart, the Ni/SiC catalyst is more resistant to sintering and carbon deposition and easier to regenerate in the methanation reaction due to the high thermal conductivity of SiC and the weak metal–support interaction.

Keywords:
Methanation
SiC
Stability
Carbon deposition
Regeneration

Published in: Applied catalysis A: General  (Volumes 462–463, Pages 1-310, 10 July 2013)

Publisher: Elsevier      

ISSN Information: 0926-860X

A comparison of Ni/SiC and Ni/Al2O3 catalyzed total methanation for production of synthetic natural gas

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