甲苯在负载型铜催化剂上吸附和氧化的原位红外光谱分析  

In situ IR study on adsorption and oxidation of toluene on supported Cu catalyst

作　　者：刘亚宁[1] 黄海涛[2] 李新军[1] 孙始财[1] 赵黛青[1] 

机构地区：[1]中国科学院广州能源研究所,广州510640 [2]广东工业大学环境科学与工程学院,广州510090

出　　处：《安全与环境学报》2005年第4期14-16,共3页Journal of Safety and Environment

基　　金：国家自然科学基金项目"脉冲电晕净化有机污染物的研究"(20376081)

摘　　要：利用原位红外光谱(insituIR)技术研究甲苯在γAl2O3、Cu/γAl2O3催化剂上的吸附、氧化分解行为。综合考虑了载体和活性组分的作用,分析了甲苯在富氧和缺氧条件下催化剂上的吸附和氧化行为。结果表明,甲苯在催化剂上的吸附较弱,但其中间产物苯甲酸却可以在催化剂表面形成较强的化学吸附,苯甲酸的深度氧化是甲苯深度氧化过程中的速度控制步骤,氧化铜是催化剂中的主要活性组分。The present paper intends to introduce the authors＇ study of the adsorption of toluene on pure support alumina and supported copper catalyst through in situ infrared spectroscopic analysis respectively. For this purpose, we have studied the function of the pure support and active element as well as the process of adsorption and oxidation of toluene on catalyst on the condition of rich and lean oxygen case by ease. Our research results indicate that the adsorption of toluene on catalyst Cu/γ-Al2O3 is very weak. And, therefore, the middle-way product of oxidation of toluene - benzoic acid - can form so strong adsorption on the surface of the catalyst Cu/γ-Al2O3 that the deep oxidation of benzoic acid may turn to be the rate-controlling factor of toluene＇ s deep oxidation . It can also be found that copper oxide may act as the key active element in the catalyst Cu/γ-Al2O3.

关 键 词：催化反应工程 甲苯 Cu/γ-Al2O3 原位红外 吸附 氧化 

分 类 号：X701[环境科学与工程—环境工程]