Kenya PM local time on May 25, Li Chen as "Beijing environmental charity ambassador" attended the Second United Nations Conference on the Environment (UNEA2), in the conference he announced to initiate the "Running Blue" which is committing to publicize environmental philosophy and youth environmental technology. At the meeting, it issued the "Beijing air pollution control process: 1998-2013 Year" assessment report; the report notes that Beijing air pollution control measures had significant effect, which has created the learnable experience to other developing economies in the world.

 

The report shows, from 1998 to 2013, air pollution control measures which continually taken by Beijing improve Beijing have played positive role in the Beijing's air quality. During the 15 years, with Beijing's resident population, vehicle fleet, the total energy consumption all sharply going up, the concentration of sulfur dioxide, nitrogen dioxide and other pollutants are reverse declined year by year, and formed the initial situation of coordinated development of economic society and environmental protection.

The two major sources of air pollution are industrial emissions and automobile exhaust emissions, for the industrial waste gas, the use of SCR technology is currently recognized as the most effective way; in the past, the governing of vehicle exhaust pollution is mainly based on noble metal catalyst, however, with the recent development of non-precious metal denitration catalyst, SCR denitration catalyst containing tungsten trioxide is more and more used for the governance of automobile exhaust gas.

 

The currently universal application of SCR denitration catalyst is typically taking vanadium pentoxide as the main active material, and tungsten trioxide generally as an additive added to the SCR denitration catalyst to play the role of anti-sulfide, resistance of carrier compaction. Tungsten oxide denitration catalyst can be used in the governance of thermal power plants and other industrial emissions, vehicle exhaust, to improve the catalyst surface acidity, thermal stability and support denitration efficiency, and furthermore to exhibit excellent activity, high reducing efficiency of PM ect..