摘要
根据铁铬系高温变换催化剂的催化机理 ,对钙钛石型稀土铁复合氧化物高温变换催化剂进行了设计和制备。采用XRD、活性评价等实验技术对模型催化剂进行了测试 ,结果表明 ,钙钛石型混合稀土铁复合氧化物具有较好的高温变换催化活性 ,以La0 .5Ce0 .5FeO3·K的催化活性最好 ,CO的转化率可达 72 % ,其热稳定性也较好 ,能与传统的铁铬系催化剂相媲美 ,是一种具有工业开发价值的无铬高温变换催化剂。
Perovskite type rare earth iron complex (PTREIC) oxides La 1-x Ce xFeO 3 were designed and successfully prepared as chromium free high temperature shift (HTS) catalysts (including those impregnated with potassium). Results from activity test and thermal stability test showed that PTREIC oxide exhibited high activity for water gas shift reaction. La 0.5 Ce 0.5 FeO 3 (· K) showed CO conversion of up to 72% and good thermal stability. It was then concluded that rare earth iron complex oxide with perovskite structure has promising future as chromium free water gas HTS catalyst.
出处
《工业催化》
CAS
2002年第6期15-18,共4页
Industrial Catalysis
基金
天津市自然科学基金资助项目 (0 0 36 0 2 111)
