With the environmental awareness increasing, the denitration standard for industrial boiler combustion flue gas is gradually becoming strictly up. Therefore, the flue gas denitration catalyst is supposed to be more efficient, high performance and anti-poisoning etc.. Of course, if the cost can controlled by the same time, it is even more Icing on the cake.This article provides a low-cost flue gas denitration tungsten trioxide SCR catalyst preparing method.

 

Steps:

The preparation of V2O5-WO3-TiO2 transition vector composite catalyst

(1)Prepare Ti source precursor solution with concentration of 0.1~5mol/L, and make sure the surface active agent contained is 1~5wt%;

(2)Add porous LOI vector into the Ti source precursor solution and stir at 50~150° C for more than 1 hour to ensure Ti source precursor diffusion and nucleation in the inner of porous carrier;

(3)Prepare the precursor of tungsten and vanadium, then added into the solution obtained in step 2 for hydrolysis reaction, keep for 1~10 hours at 90~150°C to make sure the loading amount vanadium pentoxide be 1~5% of the TiA, tungsten trioxide be 1~10% of the TiA;

(4) carrying out solid-liquid separation, the resulting precipitate is calcined in an inert atmosphere to obtain a composite catalyst V2O5-WO3-TiO2 transition vector after dried;

2.The preparation of surface sedimentary honeycomb tungsten trioxide flue gas denitration catalyst

Dry mixing the catalyst composite obtained in Step 1 with molding aid, low-cost medium, adding water, kneading, extruding to preparing the surface sedimentary honeycomb tungsten trioxide flue gas denitration catalyst.