SO2 oxidation rate reducing honeycomb type vanadium-free flue gas denitration catalyst and preparation method thereof
A denitrification catalyst and oxidation rate technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of unbalanced active centers, poor formability, unstable activity, etc., and achieve increased density , increase strength, and stabilize catalyst activity
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Embodiment 1
[0058] will contain TiO 2 500g of titanyl sulfate is dissolved in the sulfuric acid solution, adding 3 A total of 22.5g of ammonium metatungstate solution to form TiO 2 It is a 35g / L mixed solution. After stirring for 2 hours, gradually add ammonia water to adjust the pH value to 9.5. After the precipitation is complete, filter and wash; then use deionized water to make a slurry with a water content of 50%, and add CeO 2 A total of 30g of cerium nitrate solution, stirred for 1.5h, dried, roasted at 620°C for 8h, and then ground into a powder with a particle size of less than 20μm; the powder was then mixed with WO 3 A total of 7.5g of ammonium metatungstate, 4g of stearic acid, 3g of polyethylene oxide and deionized water were used to make a paste with a water content of 30%, and the pH value was adjusted to 8.5 with ammonia water, and after stirring, 5g of nano-silica, 17.5g of Glass fiber, 4g carboxymethyl cellulose, stirred for 40min, sealed and allowed to stand for 24h, ...
Embodiment 2
[0062] will contain TiO 2 500g of titanyl sulfate is dissolved in the sulfuric acid solution, adding 3 A total of 22.5g of ammonium metatungstate solution to form TiO 2 It is a 30g / L mixed solution. After stirring for 1.5h, gradually add ammonia water to adjust the pH value to 10. After the precipitation is complete, filter and wash; then use deionized water to make a slurry with a water content of 50% from the washed material, and add CeO 2 A total of 25g of cerium nitrate solution, stirred for 1.5h, dried, roasted at 620°C for 8h, and then ground into a powder with a particle size of less than 30μm; the powder was mixed with WO 3 A total of 7.5g of ammonium metatungstate, 3.5g of stearic acid, 3.5g of polyethylene oxide and deionized water to make a paste with a water content of 32%, adjust the pH value to 8.0 with ammonia water, add 4.5g of nano silicon dioxide after stirring , 17.5g glass fiber, 4g carboxymethyl cellulose, stir for 40min, seal and let stand for 24h, the...
Embodiment 3
[0066] will contain TiO 2 500g of titanyl sulfate is dissolved in the sulfuric acid solution, adding 3 A total of 20g of ammonium metatungstate solution to form TiO 2 It is a 30g / L mixed solution. After stirring for 1.0h, gradually add ammonia water to adjust the pH value to 9. After the precipitation is complete, filter and wash; then use deionized water to make a slurry with a water content of 45%, and add CeO 2 A total of 20g of cerium nitrate solution, stirred for 1.0h, dried, roasted at 620°C for 8h, and then ground into a powder with a particle size of less than 15μm; the powder was then mixed with WO 3 A total of 5g of ammonium metatungstate, 3.0g of stearic acid, 3.0g of polyethylene oxide and deionized water were used to make a paste with a water content of 28%, and the pH value was adjusted to 8.2 with ammonia water, and after stirring, 3.5g of nano-silica, 22.5g glass fiber, 3g carboxymethyl cellulose, stir for 40min, seal and let stand for 24h, then use extruder...
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