Catalyzer for catalyzing combustion and its preparing method

A catalytic combustion and catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of low utilization rate and uneven dispersion of noble metal components, and achieve good activity stability, The effect of uniform dispersion and high oxidation activity

Inactive Publication Date: 2003-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] In view of the problems of low utilization rate and uneven dispersion of noble metal components in catalytic combustion catalysts in the prior art, the present invention provides a catalytic combustion catalyst that

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 70g active γ-Al 2 o 3 Powder, 20g rutile TiO 2 powder, 5gCeO 2 powder, 5gZrO 2 Powder, mix evenly, add 4.0L distilled water, grind carefully to form an aqueous slurry. Immerse the cordierite honeycomb ceramic body in the above-mentioned water-containing slurry for 20 minutes, take it out, blow off the residual slurry in the hole with compressed air, dry it in the air at 120°C for 10 hours, and bake it in the air at 550°C for 3 hours. A coated honeycomb ceramic support. Then prepare the concentration of H containing 0.008gPt per milliliter of aqueous solution 2 PtCl 6 As for the aqueous solution, 30w% citric acid aqueous solution was added to make the concentration of citric acid in the mixed solution 0.5 mol / l, and the mixed solution was used as the impregnation solution for supporting the active component Pt. Immerse the prepared coated honeycomb ceramic carrier in the Pt impregnation solution for 120 minutes, take it out, dry it in the air at 100-120°C fo...

Embodiment 2

[0020] Weigh 50g active Al 2 o 3 Powder, 30g anatase TiO 2 powder, 15gCeO 2 powder, 5gZrO 2 Powder, mix evenly, add 2.0L distilled water, grind carefully to form a water-containing slurry. Immerse the cordierite honeycomb ceramic body in the above water-containing slurry for 40 minutes, then take it out, blow out the residual slurry in the hole with compressed air, dry it in the air at 120°C for 20 hours, and bake it in the air at 500°C for 5 hours, then it is produced A coated honeycomb ceramic support. Then prepare the concentration of H containing 0.004gPt per mL of aqueous solution 2 PtCl 6 As for the aqueous solution, 30w% oxalic acid aqueous solution is added to make the concentration of oxalic acid in the mixed solution 0.85 mol / l, and the mixed solution is used as the impregnation solution for loading the active component Pt. The prepared coated honeycomb ceramic carrier was immersed in the above Pt impregnation solution for 30 minutes, then taken out, dried in ...

Embodiment 3

[0022] Weigh 70g γ-Al 2 o 3 Powder, 14g Anatase TiO 2 powder, 10gCeO 2 Powder, 6gZrO2 Powder, mix well, add 1.4L of distilled water, grind carefully to form an aqueous slurry. Immerse the cordierite honeycomb ceramic body in the above-mentioned water-containing slurry for 30 minutes, take it out, blow off the residual slurry in the hole with compressed air, dry it in the air at 120°C for 12 hours, and bake it in the air at 550°C for 3 hours. A coated honeycomb ceramic support. Then prepare the concentration of H containing 0.008gPt per milliliter of aqueous solution 2 PtCl 6 Acetic acid was added to the aqueous solution so that the concentration of acetic acid in the mixed solution was 0.05 mol / l, and the mixed solution was used as the impregnation solution for supporting the active component Pt. The prepared coated honeycomb ceramic carrier was immersed in the above Pt impregnation solution for 60 minutes, then taken out, dried in air at 120°C for 20 hours, and calcined...

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Abstract

A catalyst for the catalytic combustion of combustible waste gas is prepared by dipping the Pt as active component on the coated layer of cellular ceramics as carrier. The said coated layer contains Al2O3 (20-80 wt.%), TiO2 (10-40 wt.%), CeO2 (5-30 wt.%) and ZrO2 (5-20 wt.%). Its advantages are high utilization rate of Pt, and high distribution uniformity.

Description

1. Technical field [0001] The invention relates to a catalytic combustion catalyst and a preparation method thereof, more specifically, the invention relates to a honeycomb catalytic combustion catalyst for purifying and treating organic waste gas and other waste gases containing combustible components and a preparation method thereof. 2. Technical background [0002] Many industrial enterprises emit a large amount of organic waste gas. This problem is particularly prominent in petroleum refining and chemical industries, as well as in industries such as electronics, printing, coatings, shoemaking, enameled wire processing, and food and feed processing. The discharge of organic waste gas has seriously polluted the atmosphere and caused great harm to the human body, so it has attracted widespread attention. Among the purification and treatment methods of organic waste gas, catalytic combustion technology is particularly attractive. Catalytic combusti...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J23/12B01J23/42B01J37/025
Inventor 李东旭刘忠生张海波杨占林
Owner CHINA PETROLEUM & CHEM CORP
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