Low-temperature flue gas SCR (Selective Catalytic Reduction) denitrating catalyst and preparation method and application thereof

[0031] Take 2.5g of cordierite honeycomb ceramics (Φ10mm×50mm, pore diameter 3mm), completely immersed in 1wt% nitric acid solution for 60 minutes, then rinse the cordierite with deionized water to remove surface impurities, put it into an oven at 110 After drying at ℃ for 12 hours, the surface-activated cordierite honeycomb ceramics were obtained for future use.

[0032] Get 30wt% silica sol 20.0g, titanyl sulfate (TiOSO 4 2H 2 (2) 30.0g was dissolved in 150ml of water to obtain a coating impregnation solution. The surface-activated cordierite honeycomb ceramics was completely immersed in the coating impregnation solution for 20 minutes, the cordierite was taken out, and the flow on the surface was blown off with a high-pressure air gun. The droplets were then dried at 110°C for 30 minutes. The dried cordierite was completely immersed in 25 wt% ammonia water for 20 minutes to carry out in-situ hydrolysis precipitation. After taking it out, blow off the ammonia water drople...

[0035] Take 2.5g of cordierite honeycomb ceramics (Φ10mm×50mm, pore diameter 3mm), completely immerse in 5wt% nitric acid solution for 60 minutes, then rinse the cordierite with deionized water, wash away the surface impurities, put it into an oven at 80 After drying at ℃ for 12 hours, the surface-activated cordierite honeycomb ceramics were obtained for future use.

[0036] Get 30wt% silica sol 60.0g, titanyl sulfate (TiOSO 4 2H 2 (2) 30.0g was dissolved in 150ml of water to obtain a coating impregnation solution. The surface-activated cordierite honeycomb ceramics was completely immersed in the coating impregnation solution for 20 minutes, the cordierite was taken out, and the flow on the surface was blown off with a high-pressure air gun. The droplets were then dried at 60°C for 100 minutes. The dried cordierite was completely immersed in 25 wt% ammonia water for 10 minutes to carry out in-situ hydrolysis precipitation. After taking it out, blow off the ammonia water dro...

[0039] Take 2.5g of cordierite honeycomb ceramics (Φ10mm×50mm, pore diameter 3mm), completely submerged in 1wt% nitric acid solution for 60 minutes, then rinse the cordierite with deionized water to remove surface impurities, put it into an oven at 150 Dry at ℃ for 3 hours to obtain a surface-activated cordierite honeycomb ceramic for future use.

[0040] Get 30wt% silica sol 3.1g, titanyl sulfate (TiOSO 4 2H 2 (2) 30.0g was dissolved in 150ml of water to obtain a coating impregnation solution. The surface-activated cordierite honeycomb ceramics was completely immersed in the coating impregnation solution for 20 minutes, the cordierite was taken out, and the flow on the surface was blown off with a high-pressure air gun. The droplets are then dried at 120 for 10 minutes. The dried cordierite was completely immersed in 5wt% ammonia water for 60 minutes to carry out in-situ hydrolysis precipitation. After taking it out, blow off the ammonia water droplets on the surface with ...