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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
【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。
【Abstract】 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.
【Key words】 catalytic chemistry; CVOCs; catalytic combustion; ceria; chlorine poisoning; polychlorinated by-products;
- 【文献出处】 工业催化 ,Industrial Catalysis , 编辑部邮箱 ,2020年04期
- 【分类号】X701
- 【被引频次】11
- 【下载频次】546