H_2O对CO在0.5%PdZrO_2/γ-Al_2O_3上催化燃烧特性的影响  

Effect of H_2O on Catalytic Combustion of CO by 0.5%PdZrO_2/γ-Al_2O_3

作　　者：刘兴[1] 吕小静[1] 翁一武[1] 

机构地区：[1]上海交通大学机械与动力工程教育部重点实验室,上海200240

出　　处：《动力工程学报》2017年第9期704-709,731,共7页Journal of Chinese Society of Power Engineering

基　　金：国家高技术研究发展计划(863计划)资助项目(2014AA052803);国家自然科学基金资助项目(51376213)

摘　　要：以0.5%PdZrO_2/γ-Al_2O_3为催化剂,在所搭建的比例积分微分控制(PID)多功能实验装置上进行CO催化燃烧基础特性实验,分析了H_2O对CO转化率的影响,以及H_2O体积分数的变化对CO转化率和CO催化燃烧反应时间的影响.结果表明:H_2O的加入大幅提升了CO在催化剂上的起燃温度和燃尽温度,增大了CO催化燃烧反应所需的活化能,且随着H_2O体积分数的增大,CO起燃温度和燃尽温度逐步升高;CO转化率随H_2O体积分数的增加逐渐降低;CO反应稳定所需时间随H_2O体积分数的增大而增加;H_2O的存在降低了催化剂的活性,抑制了催化燃烧的进行.Taking 0.5%PdZrO2/γ-A12O3 as the catalyst, catalytic combustion experiments of CO were con- ducted in a self-developed PID control muti-function test rig, so as to study the basic features of CO cata- lytic combustion, and to analyze the effect of H20 addition on the CO conversion rate, and the effect of H20 concentration on the CO conversion rate and CO reaction time. Reasults show that the ignition and burnout temperature of CO over 0.5%PdZrO2/γ-Al2O3 would be increased by addition of H20 due to the improved activation energy of catalytic combustion. Both the ignition and burnout temperature of CO in- crease with the rise of H2O concentration. The higher the concentration of H2O is, the lower the CO cov- ersion rate will be. The time to reach steady catalytic combustion of CO increases with rising H20 concen- tration. The presence of H2O reduces the activity of the catalyst, inhibiting the catalytic combustion.

关 键 词：H2O CO 催化燃烧 反应时间 转化率 

分 类 号：TQ038.1[化学工程]