ACHIEVEMENTS IN STUDY ON CATALYTIC OXIDATION TECHNOLOGY FOR ELEMENTAL MERCURY IN COAL-FIRED FLUE GAS

A brief account of SCR catalyst's effects upon catalytic oxidation of elemental mercury in the flue gas emitted from coal-fired power plants has been given,the influence of chemical compositions in said flue gas,such as HCl,SO2,NO,and NH3 etc.,as well as of the operation conditions in SCR system upon the oxidation of elemental mercury being emphatically analysed.The achievements in study on new catalysts,including manganese and its oxides,copper chloride and copper oxide,precious metals,rare-earth elements,and light catalysts etc.,have been presented.The direction of further study on catalytic oxidation of elemental mercury in flue gas should be as follows:the oxidation effect and mechanism of SCR technology for Hg,development of new and low cost catalysts,the oxidation effectiveness of newly developed catalysts on the said mercury.