The whole China's environmental protection industry started late for about 30 years up to now, its development is driven largely depending on government policy, and still in the stage of rapid development. Environmental protection industry and new energy development is generally considered to be the driving force of reshape the structure of economic development. The report analyzed that the upstream and downstream industry overview; the beneficial factors of this industry are: under the support of national industrial policy, the denitration equipment manufacturing market has a broad prospect, environmental protection equipment manufacturing technology continues to improve; however the disadvantages are: the economic development has faced with the greater downward pressure, thus to affect the environmental investments and expenses, the implementation of environmental protection policies in the system, mechanism, the implementation of environmental new policy in the aspects of system, mechanism and management are not perfect, besides, both the autonomous innovation and comprehensive ability are weak; the China domestic denitration industries market size of thermal power, steel, cement and others are in the rapid development, the market demand continued to increase. Of course, a lot of problems also encountered, such as technical, financial, talented person and performance barriers ect..

 

Air pollution control equipment manufacturing industry, especially the denitration catalyst industry is the technology, capital-intensive industry. In the early development of the China denitration technology, all the SCR key technologies and equipments are relied on the introduction of foreign. In recent years, as China's flue gas denitrification technology localization, industrialization, and the innovation development, the complexity and diversity SCR technology which adapted to Chinese coal-fired has been rapidly expanded across the thermal power industry.

 

The raw materials of SCR denitration catalyst including precious and non-precious metal oxide, wherein the precious metal is mainly Pt, Pd, Rh and Ag, etc., metal oxides are mainly V₂O₅，Fe₂O₃, CrOx, MnOx, MgO and NiO and so on. With the SCR denitration catalyst being continually researched deeply, the noble metal catalyst is soon replaced by the metal oxide catalyst. Among them, particularly the V₂O₅-WO₃/TiO₂and V₂O₅/TiO₂ researched and applied for the most, and being used in conventional SCR devices to play high catalytic activity. WO₃ is a yellow tungsten oxide with many unique properties, such as: photochromic, gas properties, catalytic, and so on, as an additive of denitration catalyst to primarily play the role of anti-sulfide, anti-sintering of carrier.