金属硫化物吸附剂脱除烟气汞研究进展

工业烟气排放的汞严重危害人体健康及生态环境，金属硫化物是一种新型的高效汞吸附剂，受到广泛关注。本文总结了近年来金属硫化物应用于脱除烟气汞的研究进展。归纳了不同金属硫化物的吸附性能，并对影响吸附性能的常见因素进行了梳理，已有研究表明金属硫化物在复杂的反应条件下仍具有优异的脱汞性能；进一步归纳了金属硫化物的汞吸附机理；总结出活性位和比表面积的调控是当前强化金属硫化物汞吸附性能的常见方法；最后对金属硫化物的再生方法进行了介绍。基于当前研究进展，未来的研究应关注如何强化金属硫化物在高温下的脱汞性能，以及如何在低温条件下实现汞的脱附从而避免当前高温热脱附方法对金属硫化物结构的破坏。

Research progress of metal sulfide adsorbents for removing mercury in flue gas

Mercury emitted from industrial flue gas does great harm to human health and the ecological environment. Metal sulfide is a new type of high-efficiency mercury adsorbent, which has attracted extensive attention. This paper reviews the recent research progresses on mercury removal from flue gas by metal sulfides. The mercury removal performance of different metal sulfides was summarized, and the main influence factors were combed. Current studies suggest that metal sulfides can give excellent mercury removal performance even under complex reaction conditions. This paper also summarizes the mercury adsorption mechanism of metal sulfides and concludes that the adjustments of active sites and specific surface area of metal sulfides are the common methods to enhance the adsorption performance. Finally, the regeneration methods of metal sulfide are introduced. Based on the current research progress, future studies should focus on how to enhance the mercury removal performance of metal sulfides at high temperature, and meanwhile to achieve mercury desorption at low temperature to avoid the destruction of metal sulfide occurred in the high-temperature thermal desorption method.