Catalyst for catalytic combustion of ketone and benzene-containing tail gas and preparation method thereof
A combustion catalyst and catalytic combustion technology, applied in the direction of catalyst activation/preparation, combustion method, physical/chemical process catalyst, etc., to achieve high-efficiency treatment, improved activity, and favorable effects of high dispersion
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Embodiment 1
[0028] Weigh CeO prepared by homogeneous method 2 1g, to be thin 10g, aluminum nitrate nonahydrate 6.5g, γ-Al 2 o 3 1.3g, aluminum hydroxide Al(OH) 3 6.5g, 30g of water, put into a ball mill and mill for 4 hours to prepare slurry A; soak 1ml of 400-mesh honeycomb ceramic carrier in the slurry for 5min, take it out, blow out the excess slurry in the pores with compressed air, and then microwave dry , baked at 600°C for 2 hours to obtain a carrier B coated with a mixed oxide coating; dip the carrier B coated with a mixed oxide coating into a palladium nitrate solution, blow out the excess solution in the pores of the honeycomb carrier with compressed air; After drying for 5 minutes, it was calcined at 550° C. for 4 hours to obtain monolithic catalyst C. The prepared catalyst was prepared in 10vol.%H 2 -90vol.%N 2 Under atmosphere, 450 DEG C reduced for 2 hours, obtained the monolithic structure catalyst S-1 (0.1wt%Pd / 20wt.%(0.94Al 2 o 3 -0.06CeO 2 ) / cordierite honey...
Embodiment 2
[0030] Weigh 8.0g of ammonium cerium nitrate, 10g of pseudothin, 6.5g of aluminum nitrate, γ-Al 2 o 3 1.3g, aluminum hydroxide Al(OH) 3 6.5g, 30g of water, put into a ball mill jar and mill for 2 hours to prepare slurry A; soak 1ml of 400 mesh honeycomb ceramic carrier in the slurry for 5min and take it out, blow out the excess slurry in the pores with compressed air, and then microwave dry , baked at 600°C for 2 hours to obtain a carrier B coated with a mixed oxide coating; dip the carrier B coated with a mixed oxide coating into a platinum nitrate solution, blow out the excess solution in the pores of the honeycomb carrier with compressed air; After drying for 5 minutes, it was calcined at 550° C. for 4 hours to obtain monolithic catalyst C. The prepared catalyst was heated at 10vol.%H 2 -90vol.%N 2 Under the atmosphere, 450 ℃ reduced for 2 hours, and the monolithic catalyst S-2 (0.2wt%Pt / 30wt.%(0.86Al 2 o 3 -0.14CeO 2 ) / cordierite honeycomb). Catalyst S-2 continuou...
Embodiment 3
[0032] Weigh 2.5g of manganese nitrate, 5g of pseudothin, 4g of aluminum nitrate, γ-Al 2 o 3 8.2g, aluminum hydroxide Al(OH) 3 3g, 30g of dilute nitric acid, added into a ball mill and milled for 4 hours to prepare slurry A; soak 1ml of 400 mesh honeycomb ceramic carrier in the slurry for 5min and take it out, blow out the excess slurry in the pores with compressed air, and then microwave dry , baked at 600°C for 2 hours to obtain a carrier B coated with a mixed oxide coating; dip the carrier B coated with a mixed oxide coating into a palladium nitrate solution, and blow out the excess solution in the pores of the honeycomb carrier with compressed air; microwave After drying for 5 minutes, it was calcined at 550° C. for 4 hours to obtain monolithic catalyst C. The prepared catalyst was heated at 10vol.%H 2 -90vol.%N 2 Under atmosphere, 450 ℃ of reductions 2 hours, make the whole structure catalyst S-3 (0.1wt%Pd / 23wt.%(0.94Al 2 o 3 -0.06MnO 2 ) / cordierite honeycomb).
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