Removal Elemental Mercury from Simulated Syn-Gas over Manganese-based Absorbents

In this study, a layered carbonate sorbent was prepared by manganese metal and anions with co-precipitation method.There CO, CO 2 , H 2 , and CH 4 gases were mixed within 48.5ppb concentration elemental mercury and used as simulated syn-gas.The mercury removal sorbent was tested in a fixed reactor operation in simulated syn-gas environment.To understand the effects of different temperatures on the removal of elemental mercury, a thermal adsorption test was performed to observe the effect of different temperatures on removal effect.The study found that the Mn-based adsorbent performed best efficiency at 100 o C and still remained 98.3% removal rate after continuous eight hours, which was higher than 83.6% of the adsorption capacity at 25 o C. With the increase of adsorption temperature, mercury removal rate has an increasing trend.However, when the temperature rises above 200 o C, the reducing gas such as CO, H 2 in the simulated gas may react with the manganese metal on the surface of the material to reduce the oxidizing ability of the mercury removal agent for elemental mercury, thereby affecting the mercury removal amount.