Ammonia low-temperature selective catalytic oxidation catalyst composition as well as preparation method and application thereof

A catalytic oxidation 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 poor selectivity, limited application, high catalyst cost, and improve the reaction efficiency and method. Simple, high catalytic effect

Pending Publication Date: 2021-08-06
山西恒投环保节能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current catalysts have high cost, poor selectivity, and easy to produce by-products, which limit their practical application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The invention discloses a low-temperature selective catalytic oxidation catalyst composition for ammonia, which uses alumina as a carrier, copper sulfide as a base film, and copper-silver as a composite catalytic film.

[0027] Its preparation method includes:

[0028] Step 1, prepare porous γ-alumina carrier with aluminum salt as raw material,

[0029]Wherein, the specific steps of step 1 are as follows: a3, adding aluminum chloride to ethanol and stirring evenly to form the first aluminum liquid, the concentration of aluminum chloride in ethanol is 200g / L; b3, adding aluminum acetate to the first Stir in the filtrate evenly to form the second aluminum liquid, the concentration of aluminum acetate in the first aluminum liquid is 100g / L, and the stirring speed is 100r / min; c3, slowly add distilled water dropwise to the second aluminum liquid and stir at low temperature until a stable Then vigorously stir until the gel aluminum liquid is formed, the amount of distilled ...

Embodiment 2

[0040] The invention discloses a low-temperature selective catalytic oxidation catalyst composition for ammonia, which uses alumina as a carrier, copper sulfide as a base film, and copper-silver as a composite catalytic film.

[0041] Its preparation method includes:

[0042] Step 1, prepare porous γ-alumina carrier with aluminum salt as raw material,

[0043] Wherein, the specific steps of step 1 are as follows: a3, adding aluminum chloride to ethanol and stirring evenly to form the first aluminum liquid, the concentration of aluminum chloride in ethanol is 400g / L; b3, adding aluminum acetate to the first Stir evenly in the filtrate to form the second aluminum liquid, the concentration of aluminum acetate in the first aluminum liquid is 200g / L, and the stirring speed is 200r / min; c3, slowly add distilled water dropwise to the second aluminum liquid and stir at low temperature until a stable The gel system, and then vigorously stirred until the gel aluminum liquid is formed, ...

Embodiment 3

[0054] The invention discloses a low-temperature selective catalytic oxidation catalyst composition for ammonia, which uses alumina as a carrier, copper sulfide as a base film, and copper-silver as a composite catalytic film.

[0055] Its preparation method includes:

[0056]Step 1, prepare porous γ-alumina carrier with aluminum salt as raw material,

[0057] Wherein, the specific steps of step 1 are as follows: a3, adding aluminum chloride to ethanol and stirring evenly to form the first aluminum liquid, the concentration of aluminum chloride in ethanol is 300g / L; b3, adding aluminum acetate to the first Stir evenly in the filtrate to form the second aluminum liquid, the concentration of aluminum acetate in the first aluminum liquid is 150g / L, and the stirring speed is 150r / min; c3, slowly add distilled water dropwise to the second aluminum liquid and stir at low temperature until a stable The gel system, and then vigorously stirred until the gel aluminum liquid is formed, t...

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PUM

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Abstract

The invention belongs to the field of catalysts, relates to the field of ammonia low-temperature catalysis, and particularly relates to an ammonia low-temperature selective catalytic oxidation catalyst composition which takes aluminum oxide as a carrier, copper sulfide as a base membrane and copper-silver as a composite catalytic membrane, and provides a preparation method and application of the catalyst composition. According to the invention, a catalytic system consisting of silver and copper on the surface has excellent capability of adsorbing oxygen and ammonia gas, so that the reaction is promoted to a certain extent, and the reaction efficiency is improved.

Description

technical field [0001] The invention belongs to the field of catalysts, relates to the field of ammonia low-temperature catalysis, and in particular relates to an ammonia low-temperature selective catalytic oxidation catalyst composition and a preparation method and application thereof. Background technique [0002] Ammonia is a colorless gas with a strong pungent odor, which not only endangers public health, but also poses a threat to the environment and ecosystem. Therefore, ammonia has been included in my country's odor pollutant emission standards and has become a corporate Items under key control. Ammonia is mainly produced in petrochemical, fertilizer, landfill, pharmaceutical wastewater, food industry and other industries. There are many sources of pollution and large emissions. The traditional ammonia removal methods mainly include absorption method, adsorption method, biological filtration method and incineration method, etc., but these methods have problems such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043B01J37/03B01J37/18B01D53/58B01D53/86
CPCB01J35/065B01J27/043B01J35/004B01J37/036B01J37/18B01D53/8634B01D2257/406
Inventor 齐恒
Owner 山西恒投环保节能科技有限公司
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