等离子体强化贵金属催化净化正葵烷的研究  

Study on n-Decane Removal by Plasma Assisted Noble Metal Catalysis

作　　者：吴祖良[1] 朱周彬 章旭明[1] 郝晓东 叶静静 姚水良[1] 

机构地区：[1]浙江工商大学环境科学与工程学院,浙江杭州310018

出　　处：《高校化学工程学报》2017年第6期1452-1458,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：浙江省公益性研究项目(2017C33042);国家自然科学基金(11575159)

摘　　要：采用一段式介质阻挡放电催化反应系统,对模拟柴油车发动机尾气中的碳氢化合物(正葵烷,C10)进行处理。研究了C10在不同贵金属催化剂作用下的去除差异性,探讨了催化剂负载量、C10初始浓度、反应温度、能量密度对等离子体贵金属催化去除C10的影响。结果表明:与单独等离子体或热催化相比,等离子体催化能够显著提高C10去除率,等离子体和催化的协同作用显著。Pt/Al_2O_3的催化效果优于Pd/Al_2O_3、Ag/Al_2O_3,其不仅转化率高,而且促进了CO氧化生成CO_2。增加催化剂负载量、能量密度和反应温度都有利于提高C10去除率和CO、CO_2选择性,实验中C10去除率可达91%,CO和CO_2总选择性最大为54.3%,而初始浓度的增加则不利于C10去除。A one-stage dielectric barrier discharge catalytic reaction system was used to treat simulated diesel engine exhaust gases （n-decane, C10）. Effects of different noble metal catalysts on C10 removal were studied and factors of catalyst loading amount, C10 initial concentration, reaction temperature and energy density on C10 removal were discussed. The results show that comparing with only plasma or thermal catalysis, plasma catalysis can significantly improve C10 removal rates. The synergistic effect of plasma and catalyst is prominent. The catalytic performance of Pt/Al2O3 is better than that of Pd/Al2O3 and Ag/Al2O3. The conversion rate of C10 with Pd/Al2O3 is higher, and it also contributes to the oxidization of CO into CO2. The increase of catalyst loading amount, energy density and reaction temperature can improve removal rates and COx selectivity of C10. The maximum removal rate is up to 91% and the highest COx selectivity is 54.3%. The increase of C10 initial concentration is not helpful to C 10 removal.

关 键 词：介质阻挡放电 贵金属催化剂 C10 去除率 COx选择性 

分 类 号：TQ54[化学工程—煤化学工程]