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Catalyst for low-temperature catalytic degradation of straight-chain alkane and preparation method thereof

A technology for straight-chain alkanes and low-temperature catalysis, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve problems such as low catalytic activity, limit the application of noble metal catalysts, and expensive costs, and achieve the preparation process And the equipment is simple, good industrial application prospects, no secondary pollution effect

Pending Publication Date: 2020-12-01
安徽稞馨环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the expensive cost and easy poisoning defects of noble metal catalysts greatly increase the production cost of enterprises and limit the application of noble metal catalysts in the hydrocarbon exhaust gas removal industry
Non-precious metal catalysts are cheap, but have low catalytic activity
Chinese patent application 202010187214.X discloses a layered cobalt oxide catalyst capable of processing alkanes such as propane at relatively low temperatures, but with a short service life

Method used

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  • Catalyst for low-temperature catalytic degradation of straight-chain alkane and preparation method thereof
  • Catalyst for low-temperature catalytic degradation of straight-chain alkane and preparation method thereof
  • Catalyst for low-temperature catalytic degradation of straight-chain alkane and preparation method thereof

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Effect test

Embodiment 1

[0031] The preparation of surface modified cobalt oxide catalyst comprises the following steps:

[0032] (1) Take 105mL ammonia water and add it to 800mL deionized water solution to get 1.5mol / L ammonia water solution;

[0033] (2) Take 0.75g potassium chloride and add it to 20mL deionized water solution to prepare 0.5mol / L potassium chloride solution;

[0034] (3) Add 116.4g of cobalt nitrate hexahydrate powder into 200mL of deionized water, and stir for 30 minutes to completely dissolve the powder to obtain a 2mol / L cobalt nitrate solution;

[0035] (4) Add 10mL of the prepared potassium chloride solution into the cobalt nitrate solution in step (3), and stir for 60 minutes to fully mix the solution to obtain a mixed solution;

[0036] (5) Add the prepared ammonia solution dropwise to the surface-modified cobalt nitrate solution in step (4), stir while adding dropwise and measure the pH value of the solution. When the pH is equal to 11, stop adding ammonia solution. Stirri...

Embodiment 2

[0041] The preparation of surface modified cobalt oxide catalyst comprises the following steps:

[0042] (1) Take 35mL ammonia water and add it to 800mL deionized water solution to prepare 0.5mol / L ammonia water solution;

[0043] (2) Take 1.5g potassium chloride and add it to 20mL deionized water solution to prepare a 1mol / L potassium chloride solution;

[0044] (3) Add 116.4g of cobalt nitrate hexahydrate powder into 200mL of deionized water, and stir for 30 minutes to completely dissolve the powder to obtain a 2mol / L cobalt nitrate solution;

[0045] (4) Add 10mL of the prepared potassium chloride solution into the cobalt nitrate solution in step (3), and stir for 60 minutes to fully mix the solution to obtain a mixed solution;

[0046] (5) Add the prepared ammonia solution dropwise to the surface-modified cobalt nitrate solution in step (4), stir while adding dropwise and measure the pH value of the solution. When the pH is equal to 11, stop adding ammonia solution. Stir...

Embodiment 3

[0051] The preparation of surface modified cobalt oxide catalyst comprises the following steps:

[0052] (1) Take 105mL ammonia water and add it to 800mL deionized water solution to get 1.5mol / L ammonia water solution;

[0053] (2) Take 0.15g of potassium chloride and add it to 20mL of deionized aqueous solution to prepare a 0.1mol / L potassium chloride solution;

[0054] (3) Add 58.2g of cobalt nitrate hexahydrate powder into 200mL of deionized water, and stir for 30 minutes to completely dissolve the powder to obtain a 1mol / L cobalt nitrate solution;

[0055] (4) Add 10mL of the prepared potassium chloride solution into the cobalt nitrate solution in step (3), and stir for 60 minutes to fully mix the solution to obtain a mixed solution;

[0056] (5) Add the prepared ammonia solution dropwise to the surface-modified cobalt nitrate solution in step (4), stir while adding dropwise and measure the pH value of the solution. When the pH is equal to 11, stop adding ammonia solution. ...

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Abstract

The invention discloses a catalyst for low-temperature catalytic degradation of straight-chain alkane and a preparation method thereof. According to the catalyst, cobalt oxide is used as a matrix, a potassium precursor solution is used as a surface modifier, surface hydroxyl is used as a catalytic active center, a large amount of hydroxyl is loaded on the surface of the cobalt oxide catalyst witha specific morphology through surface modification, the loading capacity of a potassium precursor is 0.01-2%, and the concentration of straight-chain alkane is 0.1-5%. Compared with the prior art, thecatalyst utilizes the potassium precursor surface modifier to modify the surface appearance of the cobalt oxide catalyst, and a large amount of hydroxyl groups are loaded. The surface-modified cobaltoxide catalyst has excellent catalytic activity and stability for low-concentration straight-chain alkane catalytic degradation reaction.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a catalyst for low-temperature catalytic degradation of linear alkanes and a preparation method thereof. Background technique [0002] Linear alkanes are one of the hydrocarbons, which mainly originate from the petrochemical industry, storage and transportation, gas stations, painting and printing industries, automobile exhaust emissions, etc., and are the core factors that induce atmospheric environmental problems such as smog and photochemical smog. Linear alkanes are extremely harmful to the nervous system and skin of the human body, causing deformity, cancer, and even death, polluting indoor and outdoor air, and affecting the growth of animals and plants. Catalytic degradation technology has attracted widespread attention because of its low production and use cost, high safety factor, and high energy efficiency ratio, and is internationally recognized as the ...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J35/02B01J35/10B01J37/08B01J37/00B01D53/86B01D53/72
CPCB01J23/78B01J23/002B01J37/088B01J37/0036B01D53/8668B01D2258/06B01J35/50B01J35/612
Inventor 周泽安安胜欣李文志
Owner 安徽稞馨环境科技有限公司
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