Preparation method of catalytic combustion catalyst

A catalytic combustion and catalyst technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of complex preparation process, easy cracking of coating, large amount of additives, etc., and achieve the goal of preparation The process is simple, not easy to crack, and the effect of less additives

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] We found that the above catalysts are all prepared by slurry dipping method to prepare coatings. The slurry method preparation process is more complicated, and the particle size of the particles in the ball mill slurry needs to be strictly controlled, and the obtained coatings are easy to crack and peel of

Method used

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  • Preparation method of catalytic combustion catalyst
  • Preparation method of catalytic combustion catalyst
  • Preparation method of catalytic combustion catalyst

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] Pretreatment of the honeycomb ceramic substrate: the cordierite honeycomb ceramic substrate is hydrothermally treated at 40°C for 24 hours, and then dried at 100°C for 12 hours.

[0031] Aluminum sol preparation: add 25 g of pseudo-boehmite to 200 mL of deionized water, and add 10 g of concentrated nitric acid dropwise while stirring. After stirring for a certain period of time, heating to 80°C, adding nitric acid dropwise to completely peptize, controlling the pH value of the solution at 2-5, aging for 24 hours to obtain a transparent aluminum sol.

[0032] Coating loading: immerse the pretreated cordierite honeycomb ceramic carrier into the aluminum sol prepared above, take it out, blow off the remaining liquid, dry at 120°C for 6 hours, and fire at 500°C for 5 hours.

Example Embodiment

[0033] Example 2

[0034] Pretreatment of the honeycomb ceramic substrate: the cordierite honeycomb ceramic substrate is hydrothermally treated at 80°C for 6 hours, and then dried at 110°C for 6 hours.

[0035] Preparation of aluminum sol: the same as in Example 1.

[0036] Coating load: immerse the pretreated cordierite honeycomb ceramic carrier into the aluminum sol prepared above, take it out, blow off the remaining liquid, dry at 40°C for 12 hours, and fire at 600°C for 1 hour.

Example Embodiment

[0037] Example 3

[0038] Pretreatment of the honeycomb ceramic substrate: the cordierite honeycomb ceramic substrate is hydrothermally treated at 120°C for 4 hours, and then dried at 110°C for 10 hours.

[0039] Aluminum sol preparation: add 20 grams of pseudo-boehmite to 150 mL of deionized water, and add 8 grams of concentrated nitric acid dropwise while stirring. After stirring for a certain period of time, heating to 80°C, adding nitric acid dropwise to completely peptize the solution, controlling the pH value of the solution at 2-5, aging for 24 hours to obtain a transparent aluminum sol.

[0040] Coating loading: immerse the pretreated cordierite honeycomb ceramic carrier into the aluminum sol prepared above, take it out, blow off the residual liquid, dry at 100°C for 10 hours, and fire at 500°C for 5 hours.

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Abstract

The invention discloses a preparation method of a catalytic combustion catalyst. The method comprises the following steps: firstly, performing hydrothermal pretreatment on a honeycomb ceramic matrix; secondly, soaking the honeycomb ceramic matrix with alumina sol; and finally, loading additives and precious metal active components. The catalyst coating obtained by the method of the invention has high bonding degree with the matrix, is difficult to crack and peel off and has less dosage of additives. Thus, the catalyst has good operational performance and activity stability and can maintain higher activity under the scouring of high space velocity airflow and thermal shock, so that the long-term stable operation of the catalyst can be ensured.

Description

technical field [0001] The invention relates to a catalytic combustion catalyst and a preparation method thereof, in particular to a catalyst for catalytic combustion of volatile organic compounds and a preparation method thereof. Background technique [0002] Volatile organic compounds (VOCs) refer to organic compounds with a saturated vapor pressure greater than 70Pa at normal temperature and a boiling point within 260°C at normal pressure, such as aliphatic hydrocarbons, aromatic hydrocarbons, oxygen-containing organic compounds, halogen-containing organic compounds, nitrogen-containing organic compounds and Sulfur-containing organic matter, etc. Motor vehicle emissions, energy industry, fine chemicals, printing, coatings and other industries are the main sources of VOCs. [0003] VOCs have serious harm to the environment and human health: most VOCs have peculiar smell, damage certain organs of the human body, cause lesions, and even cause cancer; VOCs react photochemica...

Claims

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Application Information

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IPC IPC(8): B01J37/00B01J37/10B01J23/63B01J23/44B01D53/72B01D53/86
Inventor 王学海刘忠生陈玉香刘新友程明珠杨英
Owner CHINA PETROLEUM & CHEM CORP
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