陶瓷基整体式催化剂催化燃烧挥发性有机物的研究进展  

Research Progress of Ceramic-based Monolithic Catalysts for the Catalytic Combustion of VOCs

作　　者：王博磊 钟和香 张晶[1] 李夺 王鹤臻 周广波 赵思阳 王新雨 潘立卫[1] WANG Bolei;ZHONG Hexiang;ZHANG Jing;LI Duo;WANG Hezhen;ZHOU Guangbo;ZHAO Siyang;WANG Xinyu;PAN Liwei(College of Environmental&Chemical Engineering,Dalian University,Dalian 116622,Liaoning,China)

机构地区：[1]大连大学环境与化学工程学院,辽宁大连116622

出　　处：《材料导报》2022年第14期120-128,共9页Materials Reports

基　　金：国家重点研发计划(2020YFB1506301);大连市杰出青年科技项目(2018RJ09)。

摘　　要：工业制造业大量排放的挥发性有机化合物(VOCs)会对大气环境和人体健康造成严重危害,其排放已受到国家的严格控制。催化燃烧法可实现VOCs的低温完全转化,降低能耗且避免了不完全燃烧造成的二次污染,成为目前最具应用前景的VOCs消除途径之一。催化燃烧技术的应用依托于高性能催化剂的研发,蜂窝陶瓷结构的整体式催化剂能够克服传统颗粒催化剂床层压降和温度梯度大、反应物在表面分布不均等缺点,具有机械强度高、床层压降低、传质效率高等优点,在高空速、大通量等苛刻的废气处理环境中发挥着不可替代的作用。目前对于VOCs催化燃烧整体式催化剂的研究重点主要集中在两方面,一是通过不同金属间的掺杂改性设计出具备良好晶型结构的催化剂来提高其催化活性和降低生产成本;二是开发简便高效的催化剂制备工艺来保证在苛刻反应条件下活性组分与基体的结合强度并提高催化剂的耐磨损性。本文对用于VOCs催化燃烧的陶瓷基整体式催化剂及其制备工艺的最新研究进展进行了分类综述,并探究了VOCs催化燃烧的基本反应机理。结合当前的发展现状及不足,对其未来的发展趋势进行了展望,以期为研制高活性、高稳定性、强通用性且低成本的VOCs催化燃烧催化剂提供参考。A large number of volatile organic compounds(VOCs),which cause serious harm to atmosphere and human health,are discharged into the environment by manufacturing industries.Their emissions have been strictly controlled by the state in recent years.Catalytic combustion realizes complete transformation of VOCs at low temperatures by significantly reducing the reaction activation energy and avoiding secondary pollution due to incomplete combustion.Therefore,it has become one of the most promising methods currently used to eliminate VOCs.The application of catalytic combustion technology depends on the use of high-performance catalysts.A monolithic catalyst with honeycomb ceramic structure can overcome the disadvantages of traditional particle catalysts,such as large drop in bed pressure,significant temperature gra-dient and uneven distribution of reactants on the surface.On the contrary,it has high mechanical strength,lower bed pressure and efficient mass transfer,playing a crucial role in achieving high airspeed,large flux and other harsh waste gas treatment.At present,the research on the monolithic catalysts for the catalytic combustion of VOCs is mainly focused on two aspects.I.Design of catalysts with good crystal structure by doping different metals to improve catalytic activity and reduce production costs.II.Development of a simple and efficient preparation process to ensure the binding strength of active components and substrate under harsh reaction conditions and enhance the wear resistance.Recent progress in research on ceramic-based monolithic catalysts for the catalytic combustion of VOCs and their preparation process are reviewed in this paper.Furthermore,the basic mechanism of the catalytic combustion of VOCs is explored.Based on the current state of research and shortcomings,the future development trend of the catalyst is prospected to provide reference for the synthesis of catalysts with high activity,good stability,strong universality and low cost for catalytic combustion of VOCs.

关 键 词：挥发性有机物 催化燃烧 陶瓷基体 整体式催化剂 制备工艺 

分 类 号：O643[理学—物理化学]