Tokyo Institute of Technology

Tsubame Bhb Co., Ltd.

Shigeki Kawamura

Hideo Hosono

Toshiharu Yokoyama

Masaaki Kitano

Jiang Li

Kazuhisa Kishida

Provided is a method for manufacturing a catalyst with which it is possible to obtain a supported metal ammonia synthesis catalyst, in which there are restrictions in terms of producing method and producing facility, and particularly large restrictions for industrial-scale producing, in a more simple manner and so that the obtained catalyst has a high activity. This method for manufacturing an ammonia synthesis catalyst includes: a first step for preparing 12CaO·7AlOhaving a specific surface area of 5 m/g or above; a second step for supporting a ruthenium compound on the 12CaO·7AlO; and a third step for performing a reduction process on the 12CaO·7AlOsupporting the ruthenium compound, obtained in the second step. This invention is characterized in that the reduction process is performed until the average particle diameter of the ruthenium after the reduction process has increased by at least 15% in relation to the average particle diameter of the ruthenium before the reduction process.

Method for manufacturing ammonia synthesis catalyst, and method for manufacturing ammonia

Provided is a method for manufacturing a catalyst with which it is possible to obtain a supported metal ammonia synthesis catalyst, in which there are restrictions in terms of producing method and producing facility, and particularly large restrictions for industrial-scale producing, in a more simple manner and so that the obtained catalyst has a high activity. This method for manufacturing an ammonia synthesis catalyst includes: a first step for preparing 12CaO.7AlOhaving a specific surface area of 5 m/g or above; a second step for supporting a ruthenium compound on the 12CaO.7AlO; and a third step for performing a reduction process on the 12CaO.7AlOsupporting the ruthenium compound, obtained in the second step. This invention is characterized in that the reduction process is performed until the average particle diameter of the ruthenium after the reduction process has increased by at least 15% in relation to the average particle diameter of the ruthenium before the reduction process.

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Meguro-ku, Japan

Shigeki Kawamura