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1. (WO2018030394) METHOD FOR MANUFACTURING AMMONIA SYNTHESIS CATALYST, AND METHOD FOR MANUFACTURING AMMONIA

Pub. No.:    WO/2018/030394    International Application No.:    PCT/JP2017/028739
Publication Date: Fri Feb 16 00:59:59 CET 2018 International Filing Date: Wed Aug 09 01:59:59 CEST 2017
IPC: B01J 37/18
B01J 23/58
B01J 35/10
C01C 1/04
Applicants: TOKYO INSTITUTE OF TECHNOLOGY
国立大学法人東京工業大学
TSUBAME BHB CO., LTD.
つばめBHB株式会社
Inventors: HOSONO Hideo
細野 秀雄
KITANO Masaaki
北野 政明
YOKOYAMA Toshiharu
横山 壽治
LI Jiang
李 江
KAWAMURA Shigeki
河村 重喜
KISHIDA Kazuhisa
岸田 和久
Title: METHOD FOR MANUFACTURING AMMONIA SYNTHESIS CATALYST, AND METHOD FOR MANUFACTURING AMMONIA
Abstract:
Provided is a method for manufacturing a catalyst with which it is possible to obtain a supported metal catalyst for ammonia synthesis, in which there are restrictions in terms of manufacturing method and manufacturing facility, and particularly large restrictions for industrial-scale manufacturing, 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•7Al2O3 having a specific surface area of 5m2/g or above; a second step for supporting a ruthenium compound on the 12CaO・7Al2O3; and a third step for performing a reduction process on the 12CaO・7Al2O3 supporting 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.