Our country is the country with the most serious mercury pollution in the world, accounting for about 40% of global emissions. Coal combustion and non-ferrous metal smelting are the fundamental reasons for my country's large mercury emissions. my country has officially joined the international Minamata Convention on Mercury, and mercury emission control will become one of the most urgent environmental issues to be solved in my country in the next step. With the support of important national projects such as 973 and 863, the main results achieved by this research team are as follows:  (1) Based on the demand for simultaneous desulfurization, denitrification and mercury removal from coal-fired flue gas, we developed upstream flue gas control technology and downstream integrated coupling technology for desulfurization, mercury removal and dust removal, forming environmental protection equipment with independent intellectual property rights (Authorized invention patent: ZL200910053740), thus solving the key problem of collaborative absorption and removal of mercury;(2) Aiming at the key problem of difficult to handle zero-valent mercury in flue gas, a new technology has been successfully developed to prepare efficient mercury removal adsorption materials using thiohalide multifunctional compounds. This material efficiently traps various forms of mercury, including zero-valent mercury, and can also convert it into low-toxicity and stable mercury sulfide (i.e., immobilization), thereby significantly reducing the risk of secondary pollution of mercury removal products. This technology has successfully broken through the property rights protection of such adsorbents abroad in terms of preparation methods and properties of adsorbent materials, and has independent intellectual property rights (ZL200610027173.8;ZL200810202642.4;ZL200810202641.X, etc.). At present, such materials have technical conditions and equipment conditions for large-scale production. With the upgrading of my country's mercury emission standards, such adsorbents will have great market application potential. (3)Combined with the needs of flue gas denitrification and zero-valent mercury conversion, an efficient multifunctional composite catalyst has been successfully developed. For the first time, an efficient mercury removal and denitrification composite catalyst based on modification of trace amounts of ruthenium and rare earth elements and mainly based on conventional V/W/Ti SCR catalysts has been developed. This catalyst is the best mercury conversion performance explored in the industry. In addition to having the above functions, this catalyst can also effectively decompose slip ammonia during the SCR process.(i.e., residual denitrification reducing agent), and can also efficiently degrade polycyclic aromatic hydrocarbons (PAHs) present in the flue gas (authorized national invention patents:  ZL200910053423.6; ZL201010568759.1; ZL201010564614.4). This kind of catalyst was named "SCR-Plus" for the first time. It will play an important role in denitrification, mercury removal, ammonia escape control and simultaneous decomposition of trace pollution in coal-fired flue gas, and has broad application prospects. (4)In view of the treatment and recovery of high-concentration mercury in non-ferrous smelting flue gas, a new technology has been developed to prepare adsorbents using smelting intermediate by-products, and simultaneously control SO3, mercury and other heavy metal pollutants in smelting flue gas through appropriate modification; This technology provides a strong guarantee for the recovery of mercury in smelting flue gas, and at the same time, it utilizes SO3, which was originally to become waste residue, reducing the consumption of sulfuric acid in the processing of downstream smelting products.  

Due to the fact that the mercury emission requirements in the relevant national environmental protection standards in the early stage were too loose, the technology markets of the two major industries for mercury removal from coal-fired and non-ferrous smelting flue gases were not effectively activated. It is believed that as my country formally joins the international Minamata Convention on Mercury, the control of mercury pollution will be significantly strengthened in the next few years, and relevant technologies will have broad market prospects. The relevant technologies currently provided have formed a complete technical system that can meet different user needs. If reasonable transformation can be carried out, it is expected to bring in more than hundreds of millions of yuan in product revenue.