Experimental Study Of Flue Gas Mercury Removal By Highly Active Absorbent

Highly active absorbents are made based on fly ash, lime paste and oxidation additive. The mercury vapors from the vapor generator together with other main composition of flue gas composed the simulating flue gas, and the experiment on simultaneous removal of SO2, NO, Hg was done in the fixed bed in order to research the effect of different factors to the mercury removal efficiency. The result of the fix bed experiment indicates: the initial removal efficiencies of absorbent M to the three pollutants SO₂, NO and Hg are 100%, 95.5%, 42.8%; and for absorbent N, they are 82.3%, 54.1%, 36.6% separately. So it can be concluded that the calcium-based absorbents that contain additive have good removal capability of sulfur dioxide, nitrogen dioxide and mercury. Through surface characteristic and energy spectrum analysis, pieces of oxidation active matter was found covering the surface of the absorbent which have the ability to catalyse and oxidize.The study has provide academic reference and pratice experience for the control of mixture pollutant in flue gas.