Abstract：
Facing the increasing demand of atmosphere pollutant control, selective catalytic reduction (SCR) technology has been widely applied in various industries for NOx abatement. However, in the condition of complicated flue gas components, the heavy metal issue is a great challenge to the catalyst deactivation and atmospheric pollution control. In this review, with the comprehensive consideration of SCR catalysts in heavy metal-rich flue gas scenarios, the distribution character of heavy metals in SCR system is firstly summarized, then the detailed interaction mechanism between heavy metals and the vanadium‑titanium-based catalyst is discussed. Focusing on the mercury oxidation as well as against arsenic/lead poisoning, certain modification strategies are also concluded to develop novel SCR catalysts with multiple functions. Furthermore, the state-of-the-art technologies regarding the regeneration, the valuable metal recovery, and the harmless treatment of the spent SCR catalyst are also reported. This paper provides theoretical guidance for the manufacture of novel SCR catalysts under multiple scenarios, as well as the synergistic control of NOx and heavy metals.
摘要：
面对日益增长的大气污染物控制需求,选择性催化还原(SCR)技术已广泛应用于各种行业中的NOx减排。然而,在烟气成分复杂的情况下，重金属问题对催化剂失活和大气污染治理是一个巨大的挑战。在这次审查中,综合考虑SCR催化剂在富重金属烟气中的应用,首先概述了重金属在SCR系统中的分布特征,然后详细讨论了重金属与钒钛基催化剂的相互作用机理。关注汞的氧化以及对砷/铅中毒，某些改性策略也得出结论，以开发具有多种功能的新型SCR催化剂。此外，关于再生的最先进的技术，有价值的金属回收，并报道了废SCR催化剂的无害化处理。本文为多场景下新型SCR催化剂的制备提供了理论指导,以及NOx和重金属的协同控制。
