Selective CO methanation catalyst, method of producing the same, and apparatus using the same


Ontology type: sgo:Patent     


Patent Info

DATE

2015-04-14T00:00

AUTHORS

Masahiro Watanabe , Hisao Yamashita , Kazutoshi Higashiyama , Toshihiro MIYAO , Aihua Chen

ABSTRACT

Provided is a new catalyst capable of removing carbon monoxide economically without adding particular reaction gas externally. Also provided are a process for producing and an apparatus using such a catalyst. Impregnation of a Ni—Al composite oxide precursor of a nonstoichiometric composition prepared by the solution-spray plasma technique with a ruthenium salt to be supported and performing reduction treatment allows CO methanation reaction to selectively proceed even in the high-temperature range in which CO2 methanation reaction and reverse water-gas-shift reaction proceed preferentially with conventional catalysts. Selective CO methanation reaction occurs reproducibly with another Ni—Al composite oxide precursor or an additive metallic species. Also, the low-temperature activity of CO methanation reaction can be improved through steps different from conventional catalyst production processes in producing such a catalyst material, whereby the temperature window the resulting catalyst material has can be utilized most effectively. More... »

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