Abstract: SmFeO₃ was prepared by the complexation method of citric acid. The perovskite structure of SmFeO₃ was determinated by XRD. The Redoxmechanism for the oxidation of CO was proven by the pulse method of reduction with CO and reoxidation with O₂ over SmFeO₃ catalyst. The steady-state kinetics of oxidation for CO over SmFeO₃ has been investi-gated with an external circulation flow reactor. The parameters of Redox equation were estimated by the method of orthogonol design. The kinetic equation of the reduction stage obeys the Bassett-Habgood equation of pulse method.

Key words: SmFeO₃ catalyst, redox mechanism, pulse kinetics

摘要： SmFeO₃用柠檬酸络合法制备。SmFeO₃钙钛矿结构用XRD测定。SmFeO₃的CO脉冲及O₂再氧化脉冲实验证实CO氧化为Redox机理。用外循环流动无梯度反应器研究了CO氧化稳态动力学。用正交设计法估计Redoo方程中动力学参数。还原步骤动力学服从Bassett-Habgood脉冲方程。

关键词: SmFeO₃催化剂, Redox机理, 脉冲动力学