公开(公告)号：US20210170369A1

公开(公告)日：2021-06-10

申请号：US16875725

申请日：2020-05-15

申请人： National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University ,  Petrochina Petrochemical Research Institute ,  Beijing Sanju Environmental Protection & New Materials Co., Ltd.

发明人： Lilong JIANG ,  Jun NI ,  Jianxin LIN ,  Shengbao HE ,  Ke LIN ,  Bingyu LIN ,  Xingyi LIN

IPC分类号： B01J23/63 ,  B01J23/58 ,  B01J21/18 ,  B01J23/04 ,  B01J35/00 ,  B01J35/10 ,  B01J37/02 ,  B01J37/08 ,  C01C1/04

摘要： Disclosed is a ruthenium-based catalyst for ammonia synthesis, preparation method and use thereof. The ruthenium-based catalyst comprises Ru—Ba-A core-shell structure which comprises a ruthenium nanoparticle as a core covered with a first shell and a second shell sequentially, wherein the first shell consists of a barium nanoparticle, and the second shell consists of a metal oxide. The Ru—Ba-A core-shell structure can effectively preventing agglomerations of ruthenium nanoparticles during the use of the catalyst and avoiding direct contact between the ruthenium nanoparticles and the metal oxides. In addition, barium nanoparticles have a promoting effect as an electronic promoter, which can effectively improve the stability and catalytic activity of ruthenium-based catalyst for ammonia synthesis, especially in the system for synthesizing ammonia from a coal gas.