Mn-Ce系列低温SCR催化剂抗硫性研究进展

Research progress in the SO_2 resistance of Mn-Ce SCR catalysts

低温选择性催化还原(SCR)工艺具有节约能耗和运行成本的优点,但是其催化剂存在SO2中毒的问题,使其难以用于工业化,因此对低温SCR催化剂抗硫性的研究就尤为重要,其中Mn-Ce系列催化剂是研究较多、抗硫效果较好的催化剂。本文介绍了SO2对Mn-Ce系列催化剂的毒化机制及Ce提高催化剂抗硫性的原因,并且从载体选择、制备方法、金属元素改性和量子化学在抗硫性领域中的应用等方面综述了近年来关于Mn-Ce系列催化剂抗硫性的研究进展,其中量子化学在SCR领域中的迅速发展对催化剂抗硫性的研究有重要帮助,可能成为未来脱硝领域的研究发展方向,为今后进一步提高催化剂的性能提供借鉴。

Low temperature selective catalytic reduction（SCR） has the advantage of low energy consumption and operating cost. However,the poor SO2 resistance of catalysts hampers its industrial application. Mn-Ce catalysts were studied by many researchers due to their relatively better SO2 resistance. This paper introduces the deactivation mechanisms of Mn-Ce catalysts. In addition,based on support selection,methods of catalyst preparation,modification of metallic element and quantum chemistry application in this field,the development of SO2 resistance of Mn-Ce catalysts are discussed. Among them,the rapid development of quantum chemistry is helpful to the research of SO2 resistance and may become a main research area in this field in the future. Moreover,it may provide a reference for future research to improve the performance of catalysts.