State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
Environ Sci Pollut Res Int. 2022 Sep;29(41):62393-62403. doi: 10.1007/s11356-021-17409-2. Epub 2022 Apr 9.
Mercury pollution from coal-fired power plants has always been an environmental concern, and adsorption technology is an effective method for Hg removal. In this study, copper-iron binary metal sulfide modified activated carbon ([Formula: see text]) adsorbent was synthesized. The performance and mechanism of mercury removal were tested by adsorption experiments and characterization methods. The results showed that the mercury removal efficiency of [Formula: see text] under simulated flue gas (SFG) conditions at 150 °C could reach 91%, which was higher than [Formula: see text] and [Formula: see text]. Compared with [Formula: see text], the introduction of Fe increased the proportion of [Formula: see text], which was usually linked to [Formula: see text], resulting in the generation of more Formula: see text species. Meanwhile, the generation of active sulfur sites such as [Formula: see text] was generated, which had a facilitative effect on the oxidation of Hg. Stable [Formula: see text] was the predominant product on the adsorbent surface. The 2% sulfur loadings had significantly improved the sulfur resistance of conventional AC.
燃煤电厂汞污染一直是一个环境关注点，而吸附技术是一种有效的汞去除方法。在本研究中，合成了铜铁二元金属硫化物修饰的活性炭([Formula: see text])吸附剂。通过吸附实验和表征方法测试了其去除汞的性能和机理。结果表明，[Formula: see text]在 150°C 的模拟烟气(SFG)条件下的汞去除效率可达 91%，高于[Formula: see text]和[Formula: see text]。与[Formula: see text]相比，Fe 的引入增加了[Formula: see text]的比例，通常与[Formula: see text]有关，导致更多Formula: see text物种的生成。同时，生成了[Formula: see text]等活性硫位，对 Hg 的氧化具有促进作用。稳定的[Formula: see text]是吸附剂表面的主要产物。2%的硫负载量显著提高了常规 AC 的抗硫性。
