GdFeO_3上CO氧化的Redox机理动力学

REDOX KINETICS OF OXIDATION FOR CO OVER GdFeO_3 CATALYST

ＧｄＦｅＯ＿３用柠檬酸络合法制备．用ＸＲＤ测定ＧｄＦｅＯ＿３为钙钛矿结构，用ＣＯ还原脉冲及用Ｏ＿２再氧化脉冲证实在ＧｄＦｅＯ＿３上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．用正文设计法估计动力学方程中的参数，还原催化剂再氧化为控制步骤．

GdFeO_3 was prepared by the compplex method with citric acid .The perovskite struc-ture for GdFeO_3 was determined with XRD. The Redox mechanism for oxidationof CO wasproven by the pulse method of reduction with CO and reoxidation with O_2 over GdFeO_3 cata-lyst.The steady-state kinetic of oxidation for CO was inverstigated with external circulationflow reactor,The parameters of kinetic equation were estimated by the method of orthogo-nala design. The control step is the reoxidation of reduced catalyst.