摘要
一、前言 以低碳醇作燃料的汽车尾气净化问题愈来愈受到人们的重视,最近,有人研究了甲醇汽车尾气Pt、Pd等催化剂处理问题。但内扩散影响尚未研究。由于深度氧化是强放热反应,传热、传质是一个突出的问题。
The effect of intraparticle diffusion of catalyst has been investigated in a flow-recirculation gradientless reactor. The kinetics of deep oxidation of methanol with 30-40 mesh catalyst on Pt/Al2O3 in the kinetic regime obeyed the Langmur-Hinshelwood model of adsorption of methanol and oxygen with inhibition of carbon dioxide. When the temperature of reaction increased to 80℃ and the particle size of catalyst increased to 6×2 mm, the deep oxidation of methanol occurred on the regime of intraparticle diffusion. The effect of intraparticle diffusion increased as reaction temperature increased. The values of catalytic effective factors were measured as 0.44-0.22. The effect of intraparticle diffusion has been interpreted with the approximation method of general reaction rate forms
出处
《环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1989年第4期6-9,共4页
Environmental Science
