The tests of mercury adsorption on Tai-Xi activated coke were conducted in an adsorption system of fixed-bed reactor.The effect of inlet mercury concentration and temperature on adsorption efficiency(removal of mercury)was studied using a simulated flue gas that was prepared by mixing flue gas component CO2

N2

O2

NO and Hg0 vapors came from a permeation tube.The results show that there is similar shape of adsorption curve for different initial mercury concentrations and efficiency of mercury removal increases with increase of inlet mercury concentration.The initial port of breakthrough curve shows that the adsorption rate is rapid

then slow and slow until to adsorption saturation.The uptake process of mercury by activated coke can be well fitted by a pseudo-second order kinetics model

indicating that for CO2/N2/O2/NO/Hg0 system

the adsorption of mercury on the activated coke takes mainly place by chemical adsorption or chemical reaction.The optimal temperature is 423 K for the best mercury removal.The Bangham equation can be applied to describe the adsorption behavior at different operation temperature

and the adsorption rate constants at different temperature follow as k423K>k463K>k403K.