Denitration practices and researched have shown that the nature of carrier has a great impact on the catalyst’s activity and life. As an important part of the denitration catalyst, the developing carrier is also a problem which is eager to be solved. The catalyst most commonly used in the market today is generally takes titanium dioxide as a carrier, tungsten trioxide, vanadium pentoxide as the main active substance. Some scholars have provided a method that uses modified cordierite powder and titanium dioxide to prepare tungsten trioxide SCR denitration catalyst, thus to improving carrier performance and reducing cost, to get the high thermal stability and wear resistance flue gas denitration  catalyst which is meeting the requirements.

 

Steps as follows:

1. Produce modified cordierite powder: immersing the cordierite powder in sulfuric acid with the temperature of 25~110 °C for 12 hours, and then drying it for 5~12 hours to obtain the modified cordierite powder;

2. Prepare catalyst active solution: dissolve the right amount of oxalic acid in deionized water for mix well, then add ammonium metavanadate, heated to 85 °C and keep the temperature for about 20 minutes;

3. Weigh the modified cordierite powder, titanium tungsten powder into a mixer, stir until uniformly mixed after glass fiber and polyvinyl alcohol added, then add catalyst activity and deionized water which are prepared;

4. Cool and adjust the solution after stirred uniformly, and decayed for 24 hours;

5. Form to honeycomb catalyst as required, and dry for 3.5~5 hours at 85~105 °C;

6. Calcining for 4~8 hours, and then continually calcining at 600 °C for 4~8 hours, to give the desired composite carrier tungsten trioxide SCR denitration catalyst products.