作　　者： ; ;

机构地区： 华东化工学院

出　　处： 《高等学校化学学报》 1992年第6期819-823,共5页

摘　　要： 用TPR等方法研究了Cu-Fe-Ce-O/γ-Al_2O_3(Ⅰ)催化剂的氧化还原性能。结果表明,在(Ⅰ)中铜的存在有利于Fe_2O_3的还原,铈作为助催化剂能增强Cu-Fe-O/γ-Al_2O_3(Ⅱ)的氧化还原性能,配合CO、NO和CO+NO气对试样进行预处理后发现,铜吸附CO的能力比铁强,铁吸附NO的能力比铜强,铈的存在可增强(Ⅱ)在NO+CO反应气氛中对CO的吸附能力,并对NO在催化剂表面吸附形成硝酸盐物种产生影响。 TPR, XPS and FTIR were used to study the redox properties of the catalyst Cu-Fe-Ce-O(Ⅰ) supported on alumina. The results show that copper in (Ⅰ ) has much stronger reduction and reoxidization properties, the presence of which facilitates the reduction of iron. Cerium as a promoter can enhance the redox properties of Cu-Fe-O( Ⅱ ) supported on alumina. The studies on the samples pretreated by CO or/and NO indicate that the adsorption of NO on iron is stronger than that on copper and the adsorption of CO on copper is stronger than that on iron. The presence of cerium can enhance the adsorption of CO in the reaction of CO+NO and has influence on the adsorption of NO in nitrates on (Ⅱ ).

关 键 词： 催化剂 氧化还原性能

领　　域： [化学工程]