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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  • Abstract
  • Description
  • Claims
  • Application Information

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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 adv

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

Examples

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Example Embodiment

[0026] Example 1

[0027] (1) Preparation of Ti-Si-molecular sieve composite sol: Take 450 g of titanium sulfate and 300 g of silica sol and add them to 1800 mL of 0.6 mol / L nitric acid solution, and add 20 g of urea, 20 g of polyacrylamide and 15 g of acetyl while stirring. acetone. After stirring uniformly, 60 grams of ZSM-5 molecular sieve was slowly added to the vigorously stirred solution, 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 into the Ti-Si-molecular sieve composite sol prepared in step (1). After taking it out, blow off the residual liquid in the pores with compressed air. After drying for 12 hours at 100°C and calcining at 600°C for 2 hours, the carrier coated with Ti-Si-molecular sieve composite coating can be obtained.

[0029] (3) Load active components: immerse the honeycomb ceramic carrier obtained in step (2) in 20g / ...

Example Embodiment

[0031] Example 2

[0032] (1) Preparation of Ti-Si-molecular sieve composite sol: add 450 g of titanium sulfate and 400 g of silica sol to 1800 mL of 2mol / L nitric acid solution, add 40 g of urea, 30 g of polyacrylamide and 30 g of acetylacetone while stirring . After stirring uniformly, 70 grams of ZSM-5 molecular sieve was slowly added to the vigorously stirred 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 into the Ti-Si-molecular sieve composite sol prepared in step (1). After taking it out, blow off the residual liquid in the pores with compressed air. After drying at 120°C for 8 hours and calcining at 550°C for 4 hours, a carrier coated with Ti-Si-molecular sieve composite coating can be obtained.

[0034] (3) Load active components: immerse the honeycomb ceramic carrier obtained in step (2) in 30g / L cerium nitrate, 8g / L si...

Example Embodiment

[0036] Example 3

[0037] (1) Preparation of Ti-Si-molecular sieve composite sol: Take 450g of titanium sulfate and 100g of silica sol and add it to 1800mL of 4mol / L nitric acid solution, add 80g of urea, 40g of polyethylene glycol and 40g of acetylacetone while stirring . After uniformly stirring, 50 grams of ZSM-5 molecular sieve was slowly added to the vigorously stirred solution, 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 into the Ti-Si-molecular sieve composite sol prepared in step (1). After taking it out, blow off the residual liquid in the pores with compressed air. After drying for 12 hours at 100°C and firing at 400°C for 5 hours, a carrier coated with a Ti-Si-molecular sieve composite coating can be obtained.

[0039] (3) Load active components: immerse the honeycomb ceramic carrier obtained in step (2) in 16g / L cerium nitra...

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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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