节点文献
具有Ru-M(M=Fe,Co,Ni,Mo)双金属活性中心的负载型氨合成催化剂
Supported Catalysts with Ru-M (M=Fe,Co,Ni,Mo) Bimetallic Active Centers for Ammonia Synthesis
【摘要】 研究了钾促进的双金属中心Ru-M(M=Fe,Co,Ni,Mo)氨合成催化剂.结果表明,Ru-Co催化剂活性最高,Ru和Co含量均为2%的Ru-Co催化剂具有最好的应用价值,其催化活性与Ru和Co含量均为4%的催化剂相近.此外,还对以镁铝尖晶石、氧化镁和镁铝复合氧化物等不同氧化物为载体的Ru-Co双金属中心催化剂进行了对比研究.结果表明,以高温煅烧制得的氧化镁作载体的催化剂活性最高.
【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;
- 【文献出处】 催化学报 ,Chinese Journal of Catalysis , 编辑部邮箱 ,2006年05期
- 【分类号】TQ113.25
- 【被引频次】15
- 【下载频次】305