摘要
挥发性有机物(VOCs)是一类具有毒性且对环境和人体健康产生威胁的有机化合物。目前催化氧化技术是有效净化VOCs的方法之一,它可以将VOCs转化为CO2和H2O。本文在总结国内外VOCs净化技术的基础上,着重介绍了催化氧化技术,并且对常用的催化剂种类、催化机理及存在的问题进行了总结。最后对催化氧化技术的发展趋势进行了展望。研究结果表明,贵金属催化剂的研究关键在于有效载体的选择及催化剂抗中毒性能的提高;与贵金属催化剂相比,钙钛矿和尖晶石等非贵金属催化剂的发展趋势为通过改变催化剂配方、催化剂形貌结构、活性组分粒径大小及比表面积等来提高催化剂的低温可还原性、储氧能力和氧缺陷,进而提高其催化性能。本文的评述将为选择合适的催化剂处理VOCs提供一定的参考基础。
Volatile organic compounds( VOCs) are poisonous organic compounds which pose a threat to environment and human health. Catalytic oxidation technology,which can convert VOCs into CO2 and H2O,is considered as one of promising techniques for VOCs removal. On the basis of the summary of VOCs removal technologies at home and abroad,catalytic oxidation method is emphatically introduced; besides,catalysts in common use,catalytic oxidation mechanism and existent problems are summarized in this paper. Finally,developmental trends of catalytic oxidation technology of VOCs are also presented. The results show that the core of noble catalysts is the optimization of effective supporters and the enhancement of resistance to catalyst poisoning. As for perovskite-type,spinel-type and other non-noble metal catalyst,it is the key to decrease the active temperature of catalysts. And it can be considered that the reduction ability,oxygen storage capacity and oxygen vacancy, which are critical factors determining catalyst performance for VOCs oxidation, can be improved by means of adjusting the compounding formula,morphological structure,particle size and specific surface area of catalysts and proceed to enhance catalyst performance. This review will offer certain value forreference to determine the proper catalyst for VOCs removal.
作者
赵倩
葛云丽
纪娜
宋春风
马德刚
刘庆岭
Zhao Qian Ge Yunli Ji Na Song Chunfeng Ma Degang Liu Qingling(Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin 300072, China State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China)
出处
《化学进展》
SCIE
CAS
CSCD
北大核心
2016年第12期1847-1859,共13页
Progress in Chemistry
基金
国家自然科学基金项目(No.21406165
51506147
21503144)
国家重点基础研究发展计划(No.2012CB214900)
天津市应用基础与前沿技术研究计划(No.15JCQNJC08500
16JCQNJC05400)资助~~
关键词
挥发性有机物
催化氧化
贵金属催化剂
非贵金属催化剂
催化氧化机理
volatile organic compounds
catalytic oxidation
noble metal catalyst
non-noble metal catalyst
catalytic oxidation mechanism