含氯挥发性有机物废气在CeO2基催化剂上的低温催化燃烧净化:从高活性到高稳定性再到高选择性  

Low-temperature catalytic combustion of chlorinated volatile organic compounds over CeO2-based catalysts:from high activity to high stability and high selectivity

作　　者：戴启广[1] 王幸宜[1] Dai Qiguang;Wang Xingyi(Research Institute of Industrial Catalysis,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学化学与分子工程学院工业催化研究所,上海200237

出　　处：《工业催化》2020年第4期1-15,共15页Industrial Catalysis

基　　金：国家重点研发计划(2016YFC0204300);国家自然科学基金(20377012,20977029,21277047,21307033,21477036,21976056);上海市自然科学基金(19ZR1412900)。

摘　　要：挥发性有机物(VOCs)造成的环境污染问题备受关注,采用高效催化剂通过催化燃烧方式在低温下后处理净化是解决VOCs污染的主要途径之一。由于VOCs种类繁多、实际应用工况复杂,因此该净化途径对催化剂的要求十分苛刻,广谱性、耐高温、抗中毒、高选择性的高效催化剂的研发仍然是该领域关注的核心问题。作为VOCs分支之一的含氯挥发性有机物(CVOCs)由于存在的广泛性、自身毒性、多氯副产物甚至是二噁英的二次生成以及催化剂Cl中毒失活等问题,成为VOCs催化燃烧领域近年来特别关注和亟待攻克的热点。本文简要综述本课题组15年来有关CVOCs在CeO2基催化剂上低温催化燃烧的进展,详细介绍从高活性CeO2催化剂的发现,到CeO2抗氯中毒失活(稳定性)、抑制多氯副产物(选择性)通用策略的提出。The environmental pollution caused by volatile organic compounds(VOCs)had attracted more and more attention,and low-temperature catalytic combustion using a high-efficiency catalyst was considered to be a promising candidate technology.Due to the variety of VOCs and the complexity of practical application conditions,the development of highly-efficient catalysts with high activity,durability,selectivity,high-temperature-resistance and poisoning resistance was crucial but still remained challenging.As one of VOCs,chlorinated volatile organic compounds(CVOCs)has become a hot topic in the field of VOCs catalytic combustion in recent years due to its wide application,self-toxicity,secondary generation of dioxins and Cl poisoning.In this review,our group's works over the past 15 years about CeO2-based catalysts for low-temperature catalytic combustion of CVOCs were briefly reviewed.The discovery of high activity CeO2 catalyst and the general strategies of solving chlorine poisoning deactivation(stability)and formation of polychlorinated by-products(selectivity)of CeO2 catalyst were introduced in detail.

关 键 词：催化化学 CVOCs 催化燃烧 氧化铈 氯中毒失活 多氯副产物 

分 类 号：X701[环境科学与工程—环境工程] O643.36[理学—物理化学]