摘要
分别阐述SCR催化剂降解二噁英机理和NH3-SCR脱硝机理;重点关注常规SCR催化剂(V2O5-WO3/Ti O2)协同脱除二噁英和NO_x的研究进展。得出常规SCR催化剂脱硝活性温度区为300～400℃,催化降解二噁英的活性温度区为200～300℃,因此难以在低温区(<200℃)实现两者协同脱除。为了避免烟气再热所需额外能耗,提高二噁英和NO_x低温协同脱除效率,指出提高催化剂低温活性是解决上述问题的有效途径之一,并从催化剂成分改性和多途径耦合两方面提出了几种提升催化剂低温(<200℃)活性的方法,详细阐述了载体选择和改性、元素掺杂、臭氧添加、紫外光照射、等离子体辅助等方法对催化剂低温活性的提升作用。
The dioxincatalytic degradation mechanism and the NH3-SCR denitrification pathways was described.The research progress in synergistic removal of dioxin and NOx by conventional SCR catalysts(V 2O 5-WO 3/TiO2)was also focused on this study.It was concluded that the active temperature window of conventional SCR catalyst for denitrification is 300~400℃,and that for dioxin decomposition is 200~300℃.It was difficult to achieve the synergistic removal of dioxin and NO x at low temperature(<200℃).In order to avoid the extra energy consumption and improve the synergistic removal efficiency of dioxin and NO x at low temperature,improve the catalyst activity at low temperature is one of the most effective methods.Therefore,catalyst internal components modification and external assistance were suggested to improve the catalyst activity at low temperature(<200℃),including supporter selection and modification,elemental doping,ozone addition,UV irradiation and plasma assisstance.
作者
张建超
王秋麟
金晶
周健健
ZHANG Jian-chao;WANG Qiu-lin;JIN Jing;ZHOU Jian-jian(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Collaborative Innovation Research Institute,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《应用化工》
CAS
CSCD
北大核心
2019年第1期211-217,共7页
Applied Chemical Industry
基金
上海市自然科学基金项目(17ZR1419400)
