等离子体复合微量贵金属催化反应器催化氧化苯的机理分析

发布时间：2019-02-09 14:24

【摘要】：苯排放到大气中会影响空气质量和人体健康,其排放需要得到控制。为此,利用装有微量贵金属(Au、Ag和Pt,负载量(质量分数)0.1×10 6~10×10 6)催化剂的介质阻挡放电(DBD)反应器分解模拟空气中的苯,研究了苯在不同贵金属负载量、不同反应温度和不同能量密度条件下的分解特性,并对苯的分解机理做了探讨。实验结果表明:1)和无催化剂的DBD反应器相比,载有贵金属催化剂的DBD反应器能显著增加苯的去除率。2)在反应温度为25℃和能量密度为400 J/L的条件下,各催化剂对苯的最大去除率按从高到低排序为:Au(93.8%)Pt(81.1%)Ag(81.0%)无催化剂(55%)。3)苯分解的气相产物为CO和CO2,在催化剂负载量和反应温度一定的条件下,苯的去除率随能量密度的增加而增加。4)在催化剂负载量、能量密度一定的条件下,苯的去除率随反应温度的增加而增加。
[Abstract]:Benzene emissions into the atmosphere will affect air quality and human health, its emissions need to be controlled. In this paper, the benzene in the air was decomposed by a (DBD) reactor with a small amount of precious metals (Au,Ag and Pt, loading amount (mass fraction) 0.1 脳 10 ~ (6) ~ (10 脳 10 ~ (-6). The benzene loading in different noble metals was studied. The decomposition characteristics of benzene at different reaction temperatures and energy densities were discussed, and the decomposition mechanism of benzene was also discussed. The experimental results show that: 1) compared with the DBD reactor without catalyst, the DBD reactor with noble metal catalyst can significantly increase the removal rate of benzene. 2) the reaction temperature is 25 鈩，

本文编号：2419047