SCR脱硝催化剂中毒的研究进展

Research progress of SCR denitrification catalyst poisoning

目前选择性催化还原法(SCR)是烟气脱硝的主要方法,而催化剂的选择则是SCR脱硝技术的关键,直接影响整个处理系统的脱硝效率与脱硝成本。探究催化剂中毒及其机理,将为现有催化剂的优化及新型催化剂的开发提供理论依据。针对脱硝过程中催化剂中毒现象,概述了SCR催化剂在使用过程中碱(土)金属、重金属、H_2O和SO_2中毒的研究进展,总结了催化剂中毒的机理,展望了SCR研究发展方向。

At present,selective catalytic reduction( SCR) is the main method for flue gas denitrification,the catalyst is the most important component of this system,it will directly affect the denitration efficiency and denitrification cost of the whole system. Exploring the catalyst poisoning and its mechanism for the optimization of existing catalysts and the development of new catalysts to provide a theoretical basis. In view of the phenomenon of catalyst poisoning in the process of denitrification,the research progress of alkali( alkali-earth) metal,heavy metal,H_2O and SO_2 poisoning in SCR catalyst was summarized. The mechanism of catalyst poisoning was summarized,and the development direction of SCR was prospected.