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Block distributed noble metal composite oxide VOCs catalyst and preparation method thereof

A composite oxide and catalyst technology, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of unstable precious metals, poor anti-toxicity, and high prices, and achieves a balance between catalyst cost and performance. activity-enhancing effect

Inactive Publication Date: 2015-06-03
刘耀军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, noble metal catalysts have the best catalytic effect, but are expensive and have poor poisoning resistance. Oxide catalysts have certain selectivity to the treated organic gases and their effects are less stable than noble metals.

Method used

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  • Block distributed noble metal composite oxide VOCs catalyst and preparation method thereof
  • Block distributed noble metal composite oxide VOCs catalyst and preparation method thereof
  • Block distributed noble metal composite oxide VOCs catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A block-distributed noble metal composite oxide VOC S The catalyst uses cordierite honeycomb ceramics as a carrier, and a basic coating is distributed on the honeycomb channels of the carrier, and the basic coating material includes γ-Al 2 o 3 , cerium-zirconium solid solution and oxide catalysts. The cerium-zirconium ratio of cerium-zirconium solid solution is 6:4, the oxide catalyst material is Mn-Cu-Fe-Co composite oxide, its total content is 15 g / L, and the mass ratio MnO:CuO:Fe 2 o 3 :Co 3 o 4 =8:3:1.5:2, the mass ratio of γ-Al2O3, cerium-zirconium solid solution, and oxide catalyst is 20:1:7.5. During the preparation process of the base coating, the oxide catalyst is fully mixed with alumina, step by step and penetrates into its microporous structure, and the thickness of the base coating is 0.4~0.5mm. A noble metal catalyst layer is distributed on the basic coating material, and the noble metal catalyst is more distributed and enriched in the surface layer...

Embodiment 2

[0030] A block-distributed noble metal composite oxide VOC S The catalyst uses cordierite honeycomb ceramics as a carrier, and a basic coating is distributed on the honeycomb channels of the carrier, and the basic coating material includes γ-Al 2 o 3 , cerium-zirconium solid solution and oxide catalysts, etc. The cerium-zirconium ratio of cerium-zirconium solid solution is 4:6, the oxide catalyst material is Mn-Cu-Fe-Co composite oxide, the total content is 12 g / L, the mass ratio MnO:CuO:Fe 2 o 3 :Co 3 o 4 =7:3:2:1, the mass ratio of γ-Al2O3, cerium-zirconium solid solution, and oxide catalyst is 25:1:8. During the preparation process of the base coating, the oxide catalyst is fully mixed with alumina, step by step and penetrates into its microporous structure, and the thickness of the base coating is 0.4~0.5mm. A noble metal catalyst layer is distributed on the basic coating material, and the noble metal catalyst is more distributed and enriched in the surface layer po...

Embodiment 3

[0036] A block-distributed noble metal composite oxide VOC S The catalyst uses cordierite honeycomb ceramics as a carrier, and a basic coating is distributed on the honeycomb channels of the carrier, and the basic coating material includes γ-Al 2 o 3 , cerium-zirconium solid solution and oxide catalysts, etc. The cerium-zirconium ratio of cerium-zirconium solid solution is 3:7, the oxide catalyst material is Mn-Cu-Fe-Co composite oxide, the total content is 20 g / L, the mass ratio MnO:CuO:Fe 2 o 3 :Co 3 o 4 =6:3:2:1, the mass ratio of γ-Al2O3, cerium-zirconium solid solution, and oxide catalyst is 15:1:6. During the preparation process of the base coating, the oxide catalyst is fully mixed with alumina, step by step and penetrates into its microporous structure, and the thickness of the base coating is 0.4~0.5mm. A noble metal catalyst layer is distributed on the basic coating material, and the noble metal catalyst is more distributed and enriched in the surface layer po...

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Abstract

The invention belongs to the technical field of environmental protection and in particular relates to a block distributed noble metal composite oxide VOCs catalyst and a preparation method thereof. According to the technical scheme disclosed by the invention, for the block distributed noble metal composite oxide VOCs catalyst, cordierite honeycomb ceramics are taken as a carrier, and a basic coating is distributed on a honeycomb pore channel of the carrier, wherein the materials of the basic coating include gamma-Al2O3, ceria-zirconium solid solutions and oxide catalysts; and noble metal catalyst layers are distributed on the materials of the basic coating. According to the catalyst prepared by the invention, fast light-off of the catalyst can be realized, and the activity is greatly improved. Moreover, according to combustion heat generated after fast light-off, the catalytic reaction can be accelerated, so the indexes of the catalyst disclosed by the invention, such as the light-off temperature and conversion rate of organic gases, are superior to those of various existing catalysts.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a block-distributed noble metal composite oxide VOCs catalyst and a preparation method. Background technique [0002] VOCs (volatile organic compounds) mainly come from petrochemical, chemical synthesis, biopharmaceutical, garbage disposal, sewage treatment, organic solvent, leather, printing and dyeing, chemical additives, feed processing and other industries, which have caused great harm to human health and the environment. It is the main precursor of PM2.5. At present, the national government and environmental protection departments have attached great importance to the environmental pollution caused by it, and the emission standards for VOCs are constantly being tightened. [0003] At present, the mainstream technology of malodorous gas treatment technology at home and abroad is the thermal oxidation method, which uses high-temperature combustion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01D53/86B01D53/44
Inventor 刘耀军
Owner 刘耀军
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