Who can explain what scr denitration catalyst is and the current situation in China?

The active component of commercial SCR catalyst is V2O5, and the carrier is anatase TiO2, WO3 or co-catalyst MoO3. The composition and proportion of SCR catalyst vary according to the content of each component in flue gas and the guaranteed value of denitration performance. Active component is the main body of multi-component catalyst and an essential component. Without it, there is a lack of necessary catalysis. The cocatalyst itself has no activity or little activity, but it can significantly improve the performance of the catalyst. It is found that WO3 and MoO3 can improve the thermal stability of the catalyst, improve the electronic interaction between V2O5 and TiO2, and improve the activity, selectivity and mechanical strength of the catalyst. In addition, MoO3 can also enhance the anti-As2O3 poisoning ability of the catalyst. The carrier mainly plays the role of supporting, dispersing and stabilizing catalytically active substances, and TiO2 itself has weak catalytic ability. Anatase TiO _ 2 was selected as the carrier of SCR catalyst. Compared with other oxide carriers (such as al2o 3 and ZrO2 _ 2), TiO _ 2 has stronger ability to inhibit SO _ 2 oxidation, and can well disperse vanadium species and semiconductor essence on the surface of TiO _ 2.

2. Requirements for SCR catalyst An ideal denitration catalyst for coal-fired flue gas needs to meet the following conditions: (1) High activity In order to meet the strict national emission standards, the denitration rate needs to reach 80% ~ 90%, that is, the catalyst is required to have high SCR activity; (2) The selective reductant NH3 is mainly oxidized by NO x to N2 and H2O, but not by O2. The high selectivity of catalyst is helpful to improve the utilization rate of reducing agent and reduce the operating cost; (3) Coal-fired power plants with good mechanical properties mostly adopt high ash layout, and the SCR catalyst needs to be washed and worn by large airflow and dust for a long time, and the mechanical strength of the catalyst is also required during installation; (4) There are many poisons in flue gas and fly ash with strong toxicity resistance, so the catalyst needs to be resistant to long-term corrosion of poisons and maintain ideal activity for a long time; (5) Other SCR catalysts have low SO2 oxidation rate, good chemical, mechanical and thermal stability, large specific surface area, good pore structure, small pressure drop, low price and long service life. In addition, the SCR catalyst is required to be simple in structure, land-saving and easy to disassemble or fill. Type of catalyst.

3. The main types of flue gas denitration catalysts in power plants are honeycomb, plate and corrugated. Honeycomb catalyst has large surface area, high activity and small volume, and currently occupies 80% of the market share, followed by flat catalyst and corrugated plate. Anhui Kangfeier Testing Technology Co., Ltd. specializes in testing the performance indexes of SCR denitration catalyst. You can visit official website.