To remove Hg⁰ from coal combustion flue gas efficiently and economically, a magnetically recoverable sorbent fabricated by incorporating γ-Fe₂O₃ into attapulgite and subsequently being loaded with CuCl₂ was developed and employed for Hg⁰ removal in a fixed-bed reactor. Results indicated that 0.05CuFA could eliminate more than 88% of Hg⁰ from the SFG with HCl or not at 150 °C under GHSV of 2 × 10⁶h⁻¹. The surface O* and Cl* species were responsible for Hg⁰ oxidation, and the products of mercury were mainly HgO and HgCl₂. O₂ contributed to Hg⁰ removal by regenerating the consumed O* and re-oxidizing the Cu⁺ and Fe²⁺. NO and SO₂ both insignificantly affected Hg⁰ removal over 0.05CuFA, because CuCl₂ could hinder the reaction of NO and SO₂ with the surface-active sites, leading to no nitrite species and few sulfate species produced on the surface. The reaction between HCl and the sorbent surface, and the generation of active Cl* was less sensitive to SO₂. The co-presence of HCl and O₂ was conducive to recovering the spent sorbent to its raw ability, and made the 0.05CuFA sustain 6 regeneration cycles. From the above advantageous aspects, this work provides an approach for cost-effectively utilizing mineral for Hg⁰ decontamination in coal combustion flue gas, and a universal mindset for exploring the Hg⁰ removal mechanism.

以除去汞⁰有效且经济地从煤炭燃烧烟道气，磁可恢复吸附剂制造通过掺入了γ-Fe ₂ ö ₃成绿坡缕石和随后被装载的CuCl ₂被开发并用于汞⁰去除在固定床反应器中。结果表明，在GHSV为2×10 ⁶ h ^-1的条件下，在150°C时，用HCl或不使用HCl ，可以去除SFG中88％以上的Hg ⁰。表面的O *和Cl *物质负责Hg ^0的氧化，汞的产物主要是HgO和HgCl ₂。O ₂促成Hg ⁰通过再生消耗的O *并重新氧化Cu ⁺和Fe ^2+进行去除。与0.05CuFA相比，NO和SO ₂均对Hg ^0的去除影响不显着，因为CuCl ₂可能会阻碍NO和SO ₂与表面活性位的反应，从而导致表面上不产生亚硝酸盐物种和少量硫酸盐物种。HCl和吸附剂表面之间的反应以及活性Cl *的生成对SO _2的敏感性较低。HCl和O ₂并存有利于将用过的吸附剂回收至其原始能力，并使0.05CuFA维持6个再生周期。从以上有利方面出发，这项工作提供了一种成本有效地利用矿物对煤燃烧烟道气中的Hg ^0进行去污染的方法，以及一种探索Hg ⁰去除机理的通用思路。