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Sulfur-tolerant catalytic combustion catalyst and preparation method thereof

A catalytic combustion and catalyst technology, which is applied in combustion methods, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of loss of catalytic combustion treatment effect of organic waste gas, low and reduced load of carrier coating, etc., to improve catalytic combustion. Activity and sulfur resistance, beneficial sulfur resistance and thermal stability, the effect of inhibiting deposition

Pending Publication Date: 2018-06-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method improves the fastness of the washcoat, but the invention requires that the slurry must be thinner, so the load of the washcoat is lower
[0007] At present, most of the catalytic combustion catalysts for organic waste gas use noble metals as active components. Catalytic combustion catalysts with noble metals as active components have the advantages of high activity and high removal rates for ordinary organic waste gases. However, when there is a certain amount of sulfide in the waste gas , the noble metal active components of the catalyst are easily deactivated by the interaction of sulfides, thereby reducing or even losing the catalytic combustion treatment effect of organic waste gas

Method used

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  • Sulfur-tolerant catalytic combustion catalyst and preparation method thereof
  • Sulfur-tolerant catalytic combustion catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Preparation of Ti-Si-molecular sieve composite sol: Add 450g of titanium sulfate and 300g of silica sol to 1800mL of nitric acid solution with a concentration of 0.6mol / L, add 20g of urea, 20g of polyacrylamide and 15g of acetyl acetone. After stirring evenly, 60 grams of ZSM-5 molecular sieves were slowly added to the vigorously stirred solution above, and aged for 24 hours to obtain a transparent Ti-Si-molecular sieve composite sol.

[0028] (2) Preparation of Ti-Si-molecular sieve composite coating: Immerse the cordierite honeycomb matrix in the Ti-Si-molecular sieve composite sol prepared in step (1), take it out, blow off the residual liquid in the channel with compressed air, and Dry at 100°C for 12 hours, and bake at 600°C for 2 hours to obtain a carrier coated with a Ti-Si-molecular sieve composite coating.

[0029](3) Loading active components: immerse the honeycomb ceramic carrier obtained in step (2) in a solution of 20g / L cerium nitrate, 5g / L silver nit...

Embodiment 2

[0032] (1) Preparation of Ti-Si-molecular sieve composite sol: Add 450g of titanium sulfate and 400g of silica sol into 1800mL of 2mol / L nitric acid solution, add 40g of urea, 30g of polyacrylamide and 30g of acetylacetone while stirring . After stirring evenly, 70 grams of ZSM-5 molecular sieves were slowly added to the vigorously stirred above solution, and aged for 24 hours to obtain a transparent Ti-Si-molecular sieve composite sol.

[0033] (2) Preparation of Ti-Si-molecular sieve composite coating: Immerse the cordierite honeycomb matrix in the Ti-Si-molecular sieve composite sol prepared in step (1), take it out, blow off the residual liquid in the channel with compressed air, and Drying at 120°C for 8 hours and sintering at 550°C for 4 hours can obtain a carrier coated with a Ti-Si-molecular sieve composite coating.

[0034] (3) Loading active components: immerse the honeycomb ceramic carrier obtained in step (2) in a solution of 30g / L cerium nitrate, 8g / L silver nitr...

Embodiment 3

[0037] (1) Preparation of Ti-Si-molecular sieve composite sol: Add 450g of titanium sulfate and 100g of silica sol into 1800mL of nitric acid solution with a concentration of 4mol / L, add 80g of urea, 40g of polyethylene glycol and 40g of acetylacetone while stirring . After stirring evenly, 50 grams of ZSM-5 molecular sieves were slowly added to the vigorously stirred solution above, and aged for 24 hours to obtain a transparent Ti-Si-molecular sieve composite sol.

[0038] (2) Preparation of Ti-Si-molecular sieve composite coating: Immerse the cordierite honeycomb matrix in the Ti-Si-molecular sieve composite sol prepared in step (1), take it out, blow off the residual liquid in the channel with compressed air, and Dry at 100°C for 12 hours, and bake at 400°C for 5 hours to obtain a carrier coated with a Ti-Si-molecular sieve composite coating.

[0039] (3) Loading active components: immerse the honeycomb ceramic carrier obtained in step (2) in a solution of 16g / L cerium nit...

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Abstract

The invention relates to a preparation method for a sulfur-tolerant catalytic combustion catalyst. The preparation method comprises the following steps: (1) preparation of Ti-Si-molecular sieve composite sol; (2) preparation of Ti-Si-molecular sieve composite coating; and (3) loading of active components. The sulfur-tolerant catalytic combustion catalyst is prepared by using the above method. Thepreparation method is simple in process; and the prepared catalyst is high in coating firmness, has good catalytic combustion activity and stability to sulfur-containing organic exhaust gas and is applicable to direct treatment of sulfur-containing organic exhaust gas.

Description

technical field [0001] The invention relates to a catalytic combustion catalyst, in particular to a sulfur-resistant catalytic combustion catalyst and a preparation method thereof. Background technique [0002] Volatile organic compounds (VOCs) are a major air pollutant produced in the petroleum refining industry as well as the electronics, printing, and coating processing industries. A large amount of organic waste gas is seriously endangering human health. The catalytic combustion method has the characteristics of low energy consumption and non-toxic by-products, so it has received more attention. However, in the petroleum processing industry and the downstream fine chemical industry, for example, the waste gas from sewage treatment plants in petroleum refineries contains hydrogen sulfide, methyl mercaptan, ethyl mercaptan, methyl sulfide, ethyl sulfide, carbon disulfide, dimethyl disulfide and other sulfur-containing Gas; CH 3 SH, CH 3 CH 2 SH, CS 2 and other sulfur...

Claims

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Application Information

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IPC IPC(8): B01J29/89F23G7/07
CPCB01J29/89F23G7/07
Inventor 王宽岭王学海刘忠生陈高升刘淑鹤程明珠
Owner CHINA PETROLEUM & CHEM CORP
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