吸附脱汞技术及其应用现状综述

Review of Adsorption Mercury Removal Technology and Its Application Status

重金属汞是燃煤烟气关键污染物之一,其毒性已被国际社会所高度关注。从吸附剂合成手段、量子化学微观模拟、工程示范类测试等3个方面评述了现有脱汞技术的研究方法,认为对原材料改性处理是主要的吸附剂合成方法,而量子化学研究重点在于吸附剂表面的吸附机理,工程示范测试则更倾向于检测和探索选择性催化还原法等技术的脱汞效率。此外,从辅助脱汞技术、协同脱汞技术、循环可再生脱汞技术以及其他新型脱汞技术等4个方面对吸附脱汞技术未来的研究进行了展望,综合推测循环可再生脱汞技术是未来脱汞技术的潜在发展方向。

Heavy metal mercury is one of the key pollutants in coal-fired flue gas,and its toxicity has been highly concerned by the international community.In this paper,the existing research methods of mercury removal technology are reviewed from three aspects:adsorbent synthesis means,quantum chemical microsimulation and engineering demonstration test.It is considered that the modification of raw materials is the main adsorbent synthesis method,while the focus of quantum chemistry research is on the adsorption mechanism of adsorbent surface,and the tendency of engineering demonstration test is to detect and explore the removal efficiency of selective catalytic reduction(SCR)method and other technologies.In addition,the future research of adsorption mercury removal technology is prospected from four aspects:auxiliary mercury removal technology,collaborative mercury removal technology,recycling and renewable mercury removal technology and other new mercury removal technologies.The results show that recycling and renewable mercury removal technology is the potential development direction of mercury removal technology in the future.