Effects of preparation conditions of Ni/TiO2 catalysts for selective CO methanation in the reformate gas

Authors: Kohei Urasaki, Yuta Tanpo, Yuta Nagashima, Ryuji Kikuchi, Shigeo Satokawa

Abstract:
Selective CO methanation in the reformate gas over Ni/TiO₂ catalyst was carried out. Nickel metal salts (nitrate, sulfate, acetate, chloride and formate) used as a precursor of nickel, calcination temperatures (400–700^◦C), reduction temperatures (350–650^◦C) and nickel contents (1–30 wt%) affected to the CO methanation activity and CO/CO₂ selectivity over the obtained Ni/TiO₂ catalysts. The appropriate nickel precursors werenitrate and acetate and suitable calcinationand reductiontemperatures were 400–500 ^◦C and 450–550^◦C, respectively. An increase of nickel contents in the Ni/TiO₂ catalysts improved to the CO methanation activity. Reverse water gas shift reaction activity was extremely low regardless of nickel contents. As a result, temperature window of Ni/TiO₂ catalyst was constant and it could be shifted to desired position by changing nickel content.

Keywords:
Selective methanation
Nickel catalyst
Titania
Reformate gas

Published in: Applied catalysis A: General  (Volume 452, Pages 1-222, 15 February 2013)

Publisher: Elsevier

ISSN Information: 0926-860X

Effects of preparation conditions of Ni/TiO2 catalysts for selective CO methanation in the reformate gas

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