Regenerable ion exchange resin derived magnetic activated carbon (Fe/AC) was prepared to remove mercury from flue gases at 120–180 °C under a high space velocity of 240000 h⁻¹, in this study. The Fe/AC showed higher mercury removal efficiency than those of either magnetic activated carbon without activation or commercial coconut-activated carbon. The optimum temperature for removal of mercury from flue gases was determined to be 120 °C and the existence of SO₂ in flue gases promoted the mercury removal efficiency of Fe/AC. Mercury compounds of HgS (metacinnabar), HgO, HgS (cinnabar) and HgSO₄ were found over spent adsorbents. The HgO was generated through the reaction of mercury with lattice oxygen and chemisorbed oxygen, while the formation of HgS was due to the reaction between mercury, FeS and sulfur over the adsorbent. The lattice oxygen could oxidize SO₂ to SO₃, which further reacted with mercury to form HgSO₄. The Fe/AC presented excellent regeneration and reuse ability, the mercury removal efficiency of which showed a great increase even after 5 runs of regeneration. The crystalline structure of Fe/AC changed remarkably after regeneration and the FeS over Fe/AC was converted to Fe₃O₄. The above excellent properties suggest that Fe/AC might be a promising adsorbent to remove mercury from flue gases.

在本研究中，准备了可再生的离子交换树脂衍生的磁性活性炭（Fe / AC），以120–180°C在240000 h ^-1的高空速下从烟道气中去除汞。与未活化的磁性活性炭或市售的椰子活化炭相比，Fe / AC的除汞效率更高。确定从烟气中去除汞的最佳温度为120°C，烟气中SO ₂的存在促进了Fe / AC的除汞效率。HgS（metacinnabar），HgO，HgS（cinnabar）和HgSO _4的汞化合物被发现是用过的吸附剂。HgO是通过汞与晶格氧和化学吸附的氧反应生成的，而HgS的形成则是由于汞，FeS和硫在吸附剂上的反应所致。晶格氧可将SO ₂氧化为SO ₃，进而与汞反应生成HgSO ₄。Fe / AC具有优异的再生和再利用能力，即使经过5次再生，其除汞效率也显示出极大的提高。再生后，Fe / AC的晶体结构发生了显着变化，Fe / AC上的FeS转化为Fe ₃ O _4。。上述优异的性能表明，Fe / AC可能是从烟道气中去除汞的有前途的吸附剂。