Early in the 1970s, the Japanese Nippon Shokubai Kasei Co., Ltd began to develop a honeycomb denitration catalyst, and realized the industrial production in the late 1980s, and then they transferred the technology to foreign countries. With the exacerbating of air pollution, NOx removal and purification have started to get attention, many countries, especially the United States, Japan and other developed countries, began to develop the denitration catalysts and get them applied. At present, China has more than 20 manufacturers of the denitration catalyst market, and about 80% of the domestic market is occupied by the United States, Japan and other foreign technologies, using the self-developed technology to produce the catalyst has only share 20% of the market.

 

Currently, the often used denitration catalyst is a metal oxide catalyst, and the most widely used of SCR catalyst is taking titanium dioxide as a carrier, vanadium pentoxide or vanadium pentoxide - WO₃, vanadium pentoxide - molybdenum trioxide as the active ingredients. The main responsibility of catalyst carrier is t usually provide the porous structure with a large specific surface area, which has the minimal activity in the SCR system, and almost does not participate in the reaction. Due to the excessive dependence on foreign technologies and products, Chinese denitration costs is really high; coupled with some foreign companies not only charge a one-time technology transfer fee, but also extract 10% of sales catalyst extraction costs which contributes to the cost rising.

 

Since 2006, China began to introduce the denitration catalyst manufacturing technology from foreign companies, Chinese started to manufacture the denitration catalyst, the use of foreign technology to produce tungsten trioxide denitration catalyst occupy most of Chinese market. Of course, the Chinese people's learning ability is very strong, after absorbing a large number of technology for many years, some Chinese enterprises has opened a self-developed WO₃DeNOx catalyst model. In 2009, an environmental technology company of China had invested more than 10 million RMB for independent research denitration catalyst production technology, and officially put into operation to achieve industrialization in September 2011. In addition, China Petroleum recently announced news that Research Institute of Petrochemical self-developed catalytic cracking (FCC) flue gas SCR denitrification catalyst PDN-102 has a successful trial run, which marks the oil has completely independent intellectual property of whole sets FCC flue gas denitration technology.