University of Yamanashi

Nikki-universal Co., Ltd.

Toshihiro Miyao

Kazutoshi Higashiyama

Masahiro Watanabe

Hisao Yamashita

Makoto Uchida

Weihua Shen

Noboru Hashimoto

Shigehito Deki

Aihua Chen

Hanako Nishino

Kazuya Shibanuma

Naoto Koizumi

The present invention provides a supported metal catalyst with excellent effectiveness factor of active metal particles which are also free from deactivation by contacting with ionomer. According to the present invention, provided is a supported metal catalyst, comprising a support that is a collective body of conductive particles; and dispersed active metal particles supported on the conductive particles, wherein the conductive particles include a plurality of pores, an average entrance pore diameter of the pores is 1 to 20 nm, a standard deviation of the average entrance pore diameter is equal to or less than 50% of the average entrance pore diameter, a number fraction of the active metal particles supported in a surface layer region of the conductive particles divided by the total number of the active metal particles is equal to or more than 50%, and the surface layer region is a region on a surface of the conductive particles or a region in the pores within a depth of 15 nm from the surface.

Supported metal catalyst, method for producing same, and method for producing carrier

The first object is to increase the life of a selective CO methanation catalyst, and the second object is to enhance the CO removal rate of a selective CO methanation catalyst to reduce the outlet CO concentration in a wide temperature range. Provided a selective CO methanation catalyst including a supported metal catalyst which selectively methanizes CO in a hydrogen-rich gas containing CO and COand a coating layer which covers a surface of the supported metal catalyst, has many pores, and is configured to reduce a CO concentration on the surface of the supported metal catalyst.

Co-selective methanation catalyst

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&#x2014;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 COmethanation reaction and reverse water-gas-shift reaction proceed preferentially with conventional catalysts. Selective CO methanation reaction occurs reproducibly with another Ni&#x2014;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.

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

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Kofu, Japan

Toshihiro Miyao