负载型NiO和CoO催化剂上N_2O分解研究  

Catalytic decomposition of N_2O over NiO and CoO catalysts supported on mullite

作　　者：兰忠[1] 张守臣[1] 王立秋[1] 刘长厚[1] 

机构地区：[1]大连理工大学化工学院,辽宁大连116012

出　　处：《工业催化》2002年第5期54-56,共3页Industrial Catalysis

摘　　要：本研究在对多种金属氧化物催化剂进行初步筛选的基础上 ,研制出以莫来石为载体的负载型NiO、CoO催化剂 ,考察了分解温度、催化剂组成和负载量对N2 O分解率的影响 ,并对其分解反应动力学进行了研究。结果表明莫来石负载NiO、CoO催化剂对N2 O分解有良好的催化性能 ;其反应速度对N2 O均为一级反应 ;同样负载量下NiO有更好的催化分解活性 ;这一研究为开发阻力低、催化性能好的工业用蜂窝型规整填料奠定了基础。Screening experiment on catalytic decomposition of N 2O over mullite supported metal oxides showed that the activity of NiO/mullite and CoO/mullite were higher than other metal oxides such as CuO/mullite ,FeO/mullite, MnO/mullite. Preparation of the catalysts , effect of metal oxides loadings and the decomposition temperature on catalytic activity were investigated. The results showed that the activity NiO/mullite and CoO/mullite is comparable to the similar metal oxide catalysts reported in literature. Kinetics study on catalytic decomposition of N 2O showed that it can be described as first order reaction with respect to N 2O and the reaction rate constant can be expressed as follows: k=9.7×10 13 exp〔-24249.2/T〕?

关 键 词：分解 研究 氧化镍 氧化钴 一氧化二氮 负载型催化剂 莫来石 

分 类 号：TQ426.99[化学工程] O613.61[理学—无机化学]