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作 者:阚家伟 李兵[1] 李林[1] 王小军[1] 陈英文[1] 祝社民[2] 沈树宝[1]
机构地区:[1]南京工业大学生物与制药工程学院,江苏南京210009 [2]南京工业大学材料科学与工程学院,江苏南京210009
出 处:《化工进展》2016年第2期499-505,共7页Chemical Industry and Engineering Progress
基 金:国家自然科学基金(21106072);江苏省高校自然科学基金(14KJB430014)项目
摘 要:含氯挥发性有机化合物(CVOCs)是一类重要的大气污染物,催化燃烧是实现CVOCs高效减排的一种主流处理技术,但工艺过程中存在氯元素易吸附在催化剂表面致使催化剂失活的问题。本文从催化燃烧CVOCs的反应机理、催化剂活性组分、催化剂载体等几个方面,对近年来催化燃烧处理CVOCs的研究进行了综述,其中催化活性组分可分为以钌、钯为主的贵金属催化剂和集中在高活性的过渡金属复合氧化物、钙钛矿型非贵金属催化剂,并重点阐述了水蒸气对催化燃烧CVOCs反应活性的影响及机制。根据国内外研究状况和技术水平,提出了催化燃烧技术的研究及发展方向,充分利用一定浓度水蒸气的优点抑制催化剂氯中毒及产生较低含量的副产物,为CVOCs高效工业化处理提供了重要的参考。Chlorinated volatile organic compounds(CVOCs) is a class of important air pollutants and catalytic combustion is a mainstream processing technology in efficiently reducing CVOCs’ emission,but that chlorine is easily adsorbed on the catalyst surface has resulted in the deactivation of the catalyst in the process. In this paper,the recent development in catalytic combustion of CVOCs with regard to reaction mechanism,active species,catalyst supports were examined,active species of catalysts can be divided into noble metal catalysts based on ruthenium,palladium and concentrated transition metal composite oxide,perovskite type non-noble metal catalysts with high activity. Additionally,the mechanism and effect of water vapor on catalytic combustion process is discussed. According to the global research status,research and development directions of the catalysts for catalytic combustion in the future are presented. Taking full advantages of a certain concentration of water vapor to inhibit chlorine poisoning of catalyst and producing fewer by-products provide an important reference for the industrialization of CVOCs destructed by catalytic combustion.
关 键 词:含氯挥发性有机化合物 催化燃烧 催化剂 催化剂载体 水蒸气
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