To avoid the application limitations of the conventional mercury adsorbents

this paper proposed a new idea using magnetic beads from fly ash to oxidize and adsorb the elemental mercury in flue gas.Combing with the problem that the chlorine content in Chinese coal is relatively low

the methods to enhance the mercury capture efficiency of the magnetic beads were developed

on the basis of abundant experimental results.It found that the Co_3O_4 and CuCl_2 modified magnetic beads present good mercury removal capacity as well as regeneration performance

which is a potential recyclable cost-efficiency catalyst for mercury removal from low chlorine coal combustion flue gas.On this basis

a feasible technological process for the application of magnetic beads was proposed:the separation of magnetic beads from fly ashes→the synthesis of magnetic beads→ the injection of magnetic beads into flue gas to capture mercury→ the collection of spent catalyst by particulate control devices→ the recovery of spent catalyst from fly ash→ the regeneration of spent sorbent→the recycle of regenerated catalyst.This process can capture the elemental mercury from the flue gas with high efficiency and low cost

and effectively avoid the secondary release and pollutionof the absorbed mercury as well.