SmFeO＿3上CO氧化Redox机理稳态及脉冲动力学

Steady -State and Pulse Kinetics of Redox Mechanism for the Oxidation of CO over SmFeO_3 Catalyst

ＳｍＦｅＯ＿３用柠檬酸络合法制备。ＳｍＦｅＯ＿３钙钛矿结构用ＸＲＤ测定。ＳｍＦｅＯ＿３的ＣＯ脉冲及Ｏ＿２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。

SmFeO_3 was prepared by the complexation method of citric acid.The perovskite structure of SmFeO_3 was determinated by XRD. The Redox mechanism for the oxidation of CO was proven by the pulse method of reduction with CO and reoxidation with O_2 over SmFeO_3 catalyst.The steady-state kinetics of oxidation for CO over SmFeO_3 has been investigated 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.