钙钛矿型氧化物La_0．35Sr_0．65Co_0．7Cu_0．3O_3催化CO

KINETICS OF CO OXIDATION ON THE PEROVSKITE-tYPE OXIDE CATALYST La_(0.35)Sr_(0.65)Co_(0.7)Cu_(0.3)O_3

采用内循环无梯度反应器研究了钙钛矿型复合氧化物Ｌａ０．３５Ｓｒ０．６５Ｃｏ０．７Ｃｕ０．３Ｏ３上ＣＯ氧化反应动力学。结果表明，常压及１６０～２００℃温度范围内，ＣＯ氧化反应速率对一氧化碳与氧分压的反应级数分别为０．５１和０．１７；反应表现活化能为６２．０ｋＪ·ｍｏｌ－１。并且对该催化剂上ＣＯ氧化反应的动力学行为、从催化剂表面氧物种的分布方式和反应性能角度出发做了一定的解释。

The kinetics of CO Oxidation on a perovskite-type oxide catalyst La0.35Sr0.65Co0.7Cu0.3O3 was investigated by means of the continuous flow recircutation method in the temperature range of 160～200℃.Results showed that the reaction orders for CO and oxgen are 0.51and 0.17 respectively. The apparent activation energy is 62.0 kJ.mol-1.