Several technologies of capturing mercury from flue gas such as adsorbent method

oxidization method

and employing existing devices and technologies to control mercury were introduced

and the developments of these technologies were also summarized.The adsorbent method is the most mature mercury removal technology at present.The common mercury removal adsorbent includes activated carbon adsorbents

fly ash

Ca-based adsorbent

mineral adsorbent and various new adsorbents.The oxidation method consists of photocatalytic oxidation

metal and metal oxide catalytic oxidation

and selective catalytic reduction

by which the Hg0in flue gas was oxidized to Hg2+by the oxidant or catalyst

thus the Hg2+was removed.The present bag filter can collect the HgP in flue gas;the electrostatic precipitator not only can collect the HgP

but also can oxidize and absorb Hg0effectively;while the Hg2+can be removed by wet desulfurization technology.The recent research progress and the problems occurred during their application of above technologies were presented.Finally

the development trend of the capturing mercury technology was proposed.