Research progress of removing mercury from coal-fired flue gas

Mercury emissions from coal-?red power plants are believed to be the largest source of anthropogenic mercury emissions. This paper illustrates the form of mercury and the main factors which affect the elimination rate of mercury. Through the introduction of the air pollution control devices（APCDs），synergistic control is feasible by taking advantage of existing APCDs. The research progress of mercury emission control is summarized. The absorbents for mercury assorption，such as active carbon，activated carbon fiber，ash，polymeric chitosan，natural mineral sorbents，and new kinds of absorbents are summarized. Recent advances in non-injection mercury sorption technologies are reviewed. Future research directions are suggested.