Chinese Journal of Catalysis

Chinese Journal of Catalysis ›› 2006, Vol. 27 ›› Issue (5): 378-380.

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Supported Catalysts with Ru-M (M=Fe, Co, Ni, Mo) Bimetallic Active Centers for Ammonia Synthesis

YANG Zhenwei1, GUO Weiming2, LIN Jingdong1, LIAO Daiwei1,3,4*   

  1. 1 Department of Chemistry, Xiamen University, Xiamen 361005, Fujian, China; 2 Department of Chemical Engineering and Bioengineering, Xiamen University, Xiamen 361005, Fujian, China; 3 State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, Fujian, China; 4 Institute of Physical Chemistry, Xiamen University, Xiamen 361005, Fujian, China
  • Received:2006-05-25 Online:2006-05-25 Published:2006-05-25

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Abstract: Supported Ru-M (M=Fe, Co, Ni, Mo) bimetallic active center catalysts with a potassium promoter for the ammonia synthesis were studied. The results show that the activity of the Ru-Co catalyst is the highest, and the activity of Ru-Mo is the lowest. When the Ru loading decreases by half (from 4% to 2%), the Ru-Co catalyst with a Co loading of 2% is the most valuable and exhibits an activity almost the same as the catalyst with 4%Ru and 4%Co. The Ru-Co catalysts with Ru and Co loadings of 2% supported on Mg-Al complex oxide, MgAl2O4 spinel, and MgO were also studied, and the catalyst supported on MgO calcined at 600 ℃ has the highest activity.

Key words: bimetallic active center, ammonia synthesis, ruthenium, iron, cobalt, nickel, molybdenium