一氧化碳作用下铁对一氧化氮的催化还原实验与动力学过程分析

Experimental and Kinetics Process Analysis of NO Catalytic Reduction by Iron under the Action of CO

实验和分析了Fe在CO作用下对NO的催化还原过程。在 112 3K时 ,在CO作用下 ,NO的转化率为 70 %。Fe、NO和CO系统中 ,反应后的表面呈现出多孔的特点。分析认为 ,在高温条件下NO在铁氧化物上的吸附能力比CO强而使反应表面存在铁氧化物 ;基于反应过程中反应界面由Fe、NO或铁氧化物、CO中反应速率慢的决定等假设 ,初步建立了上述反应的物理与数学模型。

An experiment and analysis was conducted of the catalytic reduction process of NO by iron under the action of CO. It has been found that at a temperature of 1123 K the conversion rate of NO to N 2 was 70%. A very porous structure resulted after a reaction of NO with Fe and CO. An analysis indicates that under high temperatures the absorption ability of NO on iron oxides is stronger than that of CO, resulting in the presence of iron oxides on the reaction surface. It is assumed that the reaction interface in the reaction process was decided by the slower reaction rate between Fe and NO or between iron oxides and CO. On this basis set up preliminarily was a physical and mathematical model for the above reaction.