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Catalyst for catalytic combustion of ketone-containing benzene tail gas and preparation method thereof

A technology of combustion catalyst and catalytic combustion, which is applied in the direction of catalyst activation/preparation, combustion method, physical/chemical process catalyst, etc., to achieve the effects of improving wear resistance, avoiding weak adhesion, and improving activity

Active Publication Date: 2022-04-12
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic gases such as butanone-toluene are contained in the process tail gas, in order to meet the emission standards of air pollutants

Method used

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  • Catalyst for catalytic combustion of ketone-containing benzene tail gas and preparation method thereof
  • Catalyst for catalytic combustion of ketone-containing benzene tail gas and preparation method thereof
  • Catalyst for catalytic combustion of ketone-containing benzene tail gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention discloses a monolithic catalyst for catalytic oxidation of tail gas containing ketone and benzene and a preparation method thereof. The active component of the catalyst is Pd or Pt or a certain proportion of Pd-Pt, and the carrier coating is (1-a)Al 2 o 3 ‑aM x o y composite oxides. The catalyst active components are loaded by equal volume impregnation / excessive impregnation, and transition metal composite oxides are prepared by co-precipitation, sol-gel, mechanical ball milling and other methods. The catalyst has high combustion activity and stability of ketone and benzene tail gas, and can also be used in the catalytic removal process of other VOCs gases such as phenols and ketones.

Description

technical field [0001] The invention relates to a catalyst for catalytic combustion of ketone-containing benzene tail gas and a preparation method thereof, in particular to a catalyst for catalytic combustion of ketone-containing benzene tail gas and a preparation method thereof. Background technique [0002] At present, the VOCs treatment technology at home and abroad is mainly based on catalytic combustion and adsorption. In particular, catalytic combustion has the advantages of low VOCs concentration requirements and no secondary pollution. It is the most effective VOCs purification technology. At present, the combustion catalysts used in my country need to be imported, and the main suppliers are Johnson Matthey in the UK, BASF in Germany, Süd-Chemie in Germany (acquired by Clariant), Topsoe in Denmark, etc. From the perspective of active components, there are mainly two types of noble metal catalysts and composite oxide catalysts. Among them, the active components of nob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/44B01J23/63B01J23/656B01J23/89B01J37/02B01J37/18B01D53/86B01D53/72F23G7/07
Inventor 王胜王树东林乐汪明哲
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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