Tokyo Institute of Technology

Tsubame Bhb Co., Ltd.

Japan Science and Technology Agency

Kazuhisa Kishida

Hideo Hosono

Toshiharu Yokoyama

Masaaki Kitano

Jiang Li

Shigeki Kawamura

A molded sintered body containing a mayenite type compound, an inorganic binder sintered material, and a transition metal, wherein a content of the inorganic binder sintered material is 3 to 30 parts by mass with respect to 100 parts by mass of the molded sintered body, and the molded sintered body has at least one pore peak in each of a pore diameter range of 2.5 to 20 nm and a pore diameter range of 20 to 350 nm. A method for producing the molded sintered body, including mixing a precursor of a mayenite type compound and a raw material of an inorganic binder sintered material to prepare a mixture; molding the mixture to prepare a molded body of the mixture; firing the molded body to prepare a fired product; and supporting a transition metal on the fired product to produce a molded sintered body.

Molded sintered body, and method for producing molded sintered body

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 are a supported metal material showing high catalytic activity, a supported metal catalyst, a method of producing ammonia and a method of producing hydrogen using the supported metal catalyst, and a method of producing a cyanamide compound. The supported metal material of the present invention is a supported metal material in which a transition metal is supported on a support, and the support is a cyanamide compound represented by the following general formula (1): MCN(1), wherein M represents a group II element of the periodic table, and the specific surface area of the cyanamide compound is 1 mgor more.

Supported metal material, supported metal catalyst, method of producing ammonia, method of producing hydrogen and method of producing cyanamide compound

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.

Growing community of inventors

Meguro-ku, Japan

Kazuhisa Kishida