燃料化学学报Issue(9)：1087-1092,6.
不同的沉淀剂对铁酸铜催化剂水煤气变换活性和热稳定性的影响
Effect of various precipitants on activity and thermal stability of CuFe2 O4 water-gas shift catalysts
摘要
Abstract
Three kinds of CuFe2 O4 catalyts s were synthesized by cop-recipitation method using potassium hydroxide ( A) , sodium carbonate ( B) and sodium bicarob nate( C) as the precipitants.Their catalty ic activity and thre mal stability were evalau ted in water-g as shift reaction ( WGSR) .The micor structure and surface property fo as-prepared catalysts was investigated by X-ray diffraction (XRD), N2-physisorpit on, H2-temperature programmed reduction (H2-TPR), CO2-temperature programmed desorption (CO2-TPD) and cyclic voltammetry ( CV) .The results show that the catalyst prepared with potassium hydroxide as precipitant exhibits excellent WGSR activity. Potsa sium hydroxide plays an important role in promoting the generation of CuFe2 O4 , restraining growth of crystalline CuO and CuFe2 O4 , resulting in much better dispersion of CuO on the surface of catalyts s, enhancing the reducibility of catalsy ts, and increasing the amount of weak basic sites.These factors remarkably improve the activity and thermal stability of catla ysts.关键词
水煤气变换反应/铁酸铜催化剂/还原性/弱碱性位/热稳定性Key words
water-gas shift reactio n/CuFe2 O4c atalysts/reducibility/weak basic sites/thermal stability分类
化学化工引用本文复制引用
林性贻,张勇,殷玲..不同的沉淀剂对铁酸铜催化剂水煤气变换活性和热稳定性的影响[J].燃料化学学报,2014,(9):1087-1092,6.基金项目
Supported by National Engineering Research Center of Chemical Fertilizer Catalysts , Fuzhou University （）
