通透结构泡沫硒化铜原位构筑及烟气脱汞研究

燃煤烟气汞的大量排放对公众健康和生态系统造成了严重威胁,开发新型高效脱汞技术和材料对汞污染防治具有重要意义。本文采用原位硒化方法制备了泡沫硒化铜(Cu-hs),与采用水热法制备的泡沫硒化铜(Cu-hd-1和Cu-hd-12)相比,Cu-hs具有更优的单质汞(Hg⁰)吸附性能。Cu-hs具有良好的抗H₂O和SO₂干扰能力,O₂对Cu-hs吸附Hg⁰有一定的促进作用,而HCl的存在对Hg⁰吸附没有明显影响。Cu-hs表面的汞饱和吸附量为3743 g/m³(约为15 mg/g),显著高于目前文献中报道的活性炭的饱和吸附量,具有很好的燃煤烟气脱汞应用潜力。

Study on the In-situ Construction of the Transparent Structural Foamed Copper Selenide and the Removal of Mercury From Flue Gas

The massive emission of mercury from coal-fired flue gas poses a serious threat to public health and ecosystem,and the development of new efficient mercury removal technologies and materials is of great significance to the prevention and control of mercury pollution.In this paper,copper selenide foam(Cu-hs)was prepared by in-situ selenization.Compared with copper selenide foam(Cu-hd-1 and Cu-hd-12)prepared by hydrothermal method,Cu-hs has better adsorption performance of elemental mercury(Hg⁰).Cu-hs has excellent resistance to H₂O and SO₂,and O₂ promoted Hg^O adsorption.While the presence of HCl has no obvious influence on the adsorption of Hg⁰.The saturated adsorption capacity of mercury on the surface of Cu-hs is3743 g/m³(about 15 mg/g),which is much higher than the saturated adsorption capacity of activated carbon reported in the current study,and has a good potential for mercury removal from flue gas.