Method for preparing selective catalytic reduction (SCR) denitration catalyst by taking TiO2-ZnO as composite carrier
A technology of denitrification catalyst and composite carrier, which is applied in the field of selective catalytic reduction denitrification catalyst, can solve the problems of high cost, restricting the promotion and application of manganese-titanium system SCR catalyst, and high price, and achieves low cost, high low temperature activity and low cost Effect
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Embodiment 1
[0018] A TiO 2 -ZnO is the preparation of the SCR denitration catalyst of the composite carrier comprising the following steps:
[0019] Add 14.40g of titanyl sulfate, 2.97g of zinc nitrate, 9.80g of manganese acetate, and 3.04g of cerium nitrate into 200mL of distilled water, and stir magnetically for 0.5h in a water bath at 60°C; Add it dropwise to the above solution, and add 50mL of 30% hydrogen peroxide solution dropwise to the solution, and continue to stir for 1h until the precipitate is completely formed; wash the separated precipitate twice with distilled water and absolute ethanol, and place it in an evaporating dish Put it in a drying oven at 70°C for 12 hours. The dried samples were ground and calcined at 450 °C for 4 h.
[0020] Denitrification rate test conditions: 1000ppmNO, 1000ppmNH 3 , 5%O 2 , N 2 As the carrier gas, the gas flow rate is 2000mL / min, and the space velocity is 27000h -1 . Under these conditions, the denitrification rate of the catalyst is...
Embodiment 2
[0022] A TiO 2 -ZnO is the preparation of the SCR denitration catalyst of the composite carrier comprising the following steps:
[0023] Add 11.20g of titanyl sulfate, 8.92g of zinc nitrate, 12.25g of manganese acetate, and 3.47g of cerium nitrate into 250mL of distilled water, stir magnetically for 0.5h in a water bath at 60°C; add 500mL (0.5mol / L) of sodium hydroxide The solution was added dropwise to the above solution, and 50mL of 30% hydrogen peroxide solution was added dropwise to the solution, and the stirring was continued for 1h until the precipitate was completely formed; the separated precipitate was washed twice with distilled water and absolute ethanol, and placed in the evaporation Place in a drying oven at 70°C for 12 hours. The dried samples were ground and calcined at 450 °C for 4 h.
[0024] Denitrification rate test conditions: 1000ppmNO, 1000ppmNH 3 , 5%O 2 , N 2 As the carrier gas, the gas flow rate is 2000mL / min, and the space velocity is 27000h -1 ...
Embodiment 3
[0026] A TiO 2 -ZnO is the preparation of the SCR denitration catalyst of the composite carrier comprising the following steps:
[0027] Add 9.60g of titanyl sulfate, 11.90g of zinc nitrate, 20.01g of manganese nitrate, and 2.98g of cerium trichloride into 300mL of distilled water, stir magnetically for 0.5h in a water bath at 80°C; Potassium solution was added dropwise to the above solution, and 60 mL of 30% hydrogen peroxide solution was added dropwise to the solution, and the stirring was continued for 1.5 h until a precipitate was completely formed; the separated precipitate was washed 3 times with distilled water and absolute ethanol respectively, and placed in In an evaporating dish, put it in a drying oven at 90°C for 10 hours. The dried samples were ground and calcined at 550 °C for 3 h.
[0028] Denitrification rate test conditions: 1000ppmNO, 1000ppmNH 3 , 5%O 2 , N 2 As the carrier gas, the gas flow rate is 2000mL / min, and the space velocity is 27000h -1 . Un...
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