Effect of chlorine on the speciation of mercury in flue gases
氯元素对烟气中汞的形态和分布的影响

Using chemical thermal equilibrium analysis the speciation of mercury in flue gases during coal combustion and gasification was studied Under standard atmosphere and temperature of 400K-2000K and in Hg Coal system and Hg Coal Cl system, the speciation of mercury was studied in reducing atmosphere and oxidizing atmosphere, especially the effect of chlorine on the speciation of Hg was discussed.The results showed that in the high temperature zone of coal combustion and gasification, elemental mercury is in thermal stable form, chlorine can greatly improve the evaporation of mercury In the reducing atmosphere, the elemental Hg is the main form, while in the oxidizing atmosphere, at low temperature zone, the elemental Hg will react with other components in the flue gases to form HgCl2 The greater the content of Cl in flue gases, the wider temperature zone of the main form of mercury HgCl2 is obtained.