Effects of flue gas components and fly ash on mercury oxidation

J LUO, L ZHANG, H HUANG… - Chinese Journal of …, 2011 - cje.ustb.edu.cn
J LUO, L ZHANG, H HUANG, J ZHANG
Chinese Journal of Engineering, 2011cje.ustb.edu.cn
The effects of gas components such as O 2, SO 2 and HCl, the existence of fly ash, and
temperature on mercury speciation were investigated. It is shown that high temperature is
positive to mercury oxidation in most of the simulated flue gas system except for the N 2-SO
2 system. The existence of O 2, SO 2 and HCl in the system separately improves the
oxidation process, and among them HCl performs the best. When both SO 2 and HCl are in
the system, the oxidation efficiency of HCl decreases due to the reaction between SO 2 and …
Abstract
The effects of gas components such as O 2, SO 2 and HCl, the existence of fly ash, and temperature on mercury speciation were investigated. It is shown that high temperature is positive to mercury oxidation in most of the simulated flue gas system except for the N 2-SO 2 system. The existence of O 2, SO 2 and HCl in the system separately improves the oxidation process, and among them HCl performs the best. When both SO 2 and HCl are in the system, the oxidation efficiency of HCl decreases due to the reaction between SO 2 and HCl. Fly ash provides, reaction media and catalysts for the mercury oxidation reaction, and consequently, the existence of fly ash in the simulated flue gas can increase mercury speciation.
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