负载型NiO和CoO催化剂上N2O分解研究

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N2O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N2O分解有良好的催化性能;其反应速度对N2O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。

Catalytic decomposition of N2O over NiO and CoO catalysts supported on mullite

Screening experiment on catalytic decomposition of N2O 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 N2O showed that it can be described as first order reaction with respect to N2O and the reaction rate constant can be expressed as follows:k=9.7×1013exp〔-24249.2/T〕。