选择性催化还原脱硝催化剂失活研究综述

Review of the Deactivation of Selective Catalytic Reduction DeNO_x Catalysts

从催化剂的烧结、磨蚀、堵塞、沾污/遮蔽、中毒5个方面综述了选择性催化还原(selective catalytic reduction,SCR)脱硝催化剂的失活研究现状,总结了催化剂的失活规律和失活机制。烟气中的飞灰对催化剂的影响是SCR烟气脱硝过程中的关键问题。根据SCR脱硝催化剂的具体应用情况,可以有针对性地通过优化锅炉运行、SCR脱硝系统的设计、催化剂的特性等来减缓催化剂的失活速率。

A review of the deactivation of selective catalytic reduction （SCR） deNOx catalysts was presented based on catalyst sintering, abrasion, blocking, fouling/masking and poisoning. The law and mechanism of catalyst deactivation was reviewed. The effect of fly ash in flue gas on the catalysts is critical in the SCR deNOx process. According to the application of SCR deNOx catalysts, the catalyst deactivation rate can be decreased by optimizing boiler operation, the design of SCR deNOx system, catalyst performance, and so on.