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.
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.
出处
《催化学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第5期378-380,共3页
基金
国家自然科学基金(20273053
20023001和29933040)
国家重点基础研究发展计划(973计划)(001CB108906)
福建省自然科学基金(E0310001)资助项目
关键词
双金属活性中心
氨合成
钌
铁
钴
镍
钼
bimetallic active center
ammonia synthesis
ruthenium
iron
cobalt
nickel
molybdenium
