Honeycomb type flue gas denitrification catalyst and preparation method thereof
A denitrification catalyst, honeycomb technology, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve problems such as poor resistance to poisoning, unbalanced active centers, and unstable activity, etc., to achieve Increase density, improve water resistance, and stabilize catalyst activity
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Embodiment 1
[0056] 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 V 2 o 5 A total of 4.5g of ammonium metavanadate 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 40 minutes, sealed and left for 2...
Embodiment 2
[0060] 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 V 2 o 5 A total of 4.5g of ammonium metavanadate 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 then 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 st...
Embodiment 3
[0064] 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 V 2 o 5 A total of 5g of ammonium metavanadate 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 mixed with WO 3A total of 5g of ammonium metatungstate, 3.0g of stearic acid, 3.0g of polymethyl methacrylate 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 nanometer di Silicon oxide, 22.5g glass fiber, 3g carboxymethyl cellulose, stir for 40min, seal and let stand for...
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