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Anti-oxidation additive of organic amine carbon dioxide absorbent and use method thereof

An anti-oxidation additive, carbon dioxide technology, applied in chemical instruments and methods, through absorption, separation methods, etc., can solve problems such as chemical corrosion, alkalinity loss, tower equipment corrosion, etc., achieve good corrosion inhibition and prevent alkalinity loss , low toxicity effect

Inactive Publication Date: 2013-11-27
SHANGHAI BOILER WORKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As specific chemical absorbents, organic amine absorbents are the most researched at present, and most coal-fired power plants have adopted this absorbent. The quality of the absorbent is one of the main determinants in the carbon dioxide capture process, but in Under the flue gas environment of coal-fired power plants, the current absorbents are prone to oxidation, fly ash pollution, chemical corrosion and other problems, and the absorbents are prone to deterioration and failure
In particular, the alkanolamine oxidation reaction tends to generate acidic substances, which causes the loss of available alkalinity in the absorbent, and the by-products of the oxidation of the absorbent tend to react with the metals in the carbon steel in the tower equipment, causing the tower equipment to be damaged. corrosion

Method used

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  • Anti-oxidation additive of organic amine carbon dioxide absorbent and use method thereof
  • Anti-oxidation additive of organic amine carbon dioxide absorbent and use method thereof
  • Anti-oxidation additive of organic amine carbon dioxide absorbent and use method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] In this embodiment, the antioxidant additive of the organic amine carbon dioxide absorber is N,N,N',N'-tetramethyl-p-phenylenediamine. Its performance test is as follows:

[0020] 1. Preparation of organic amine carbon dioxide absorbent:

[0021] Using water as solvent, a 20% mass fraction of ethanolamine (MEA) solution was prepared.

[0022] N,N,N',N'-tetramethyl-p-phenylenediamine was added to the MEA solution with a mass fraction of 20% to obtain N,N,N',N'-tetramethyl-p-phenylenediamine ( TMPD) MEA solution, wherein the concentration of N,N,N',N'-tetramethyl-p-phenylenediamine is 50 mg / L.

[0023] 2. Performance testing:

[0024] 2.1. Test of oxidation rate

[0025] The determination of the oxidation rate in this example is calculated as the time at which the concentration of amine (MEA) is reduced to 95%. To increase the reaction rate, 100% oxygen was used. The oxidation rate of organic amine carbon dioxide absorbents in the presence of 100% oxygen was measure...

Embodiment 2

[0035] In this embodiment, the antioxidant additive of the organic amine carbon dioxide absorber is N,N,N',N'-tetramethyl-p-phenylenediamine. Its performance test is as follows:

[0036] 1. Preparation of organic amine carbon dioxide absorbent:

[0037] Using water as solvent, a 20% mass fraction of ethanolamine (MEA) solution was prepared.

[0038] N,N,N',N'-tetramethyl-p-phenylenediamine was added to the MEA solution with a mass fraction of 20% to obtain N,N,N',N'-tetramethyl-p-phenylenediamine MEA solution, wherein the concentration of N,N,N',N'-tetramethyl-p-phenylenediamine is 150 mg / L.

[0039] 2. Performance testing:

[0040] 2.1 Test of oxidation rate:

[0041] The determination of the oxidation rate in this example is calculated as the time at which the concentration of amine (MEA) is reduced to 95%. To increase the reaction rate, 100% oxygen was used. The oxidation rate of organic amine carbon dioxide absorbents in the presence of 100% oxygen was measured in a ...

Embodiment 3

[0050] The antioxidant additive of the organic amine carbon dioxide absorbent in this embodiment is N,N,N',N'-tetramethyl-p-phenylenediamine. Its performance test is as follows:

[0051] 1. Preparation of organic amine carbon dioxide absorbent:

[0052] Using water as a solvent, a 20% ethanolamine (MEA) solution was prepared.

[0053] N, N, N', N'-tetramethyl-p-phenylenediamine is added to the MEA solution with a mass fraction of 20%, to obtain N, N, N', N'-tetramethyl-p-phenylenediamine MEA solution, wherein, the concentration of N, N, N', N'-tetramethyl-p-phenylenediamine is 200mg / L.

[0054] 2. Performance testing:

[0055] 2.1 Test of oxidation rate:

[0056] The determination of oxidation rate in this example is calculated by the time when the concentration of amine (MEA) decreases to 95%. To increase the reaction rate, 100% oxygen was used. The oxidation rate of the organic amine carbon dioxide absorber in the presence of 100% oxygen was measured in a constant temp...

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Abstract

The invention provides an anti-oxidation additive of an organic amine carbon dioxide absorbent, which is characterized by containing one mixture or more than two mixtures of N,N,N',N'-tetra substituted phenylenediamine and hydrochloride. The anti-oxidation additive can prevent alkalinity loss caused by oxidation of the absorbent, and has a good corrosion inhibition role to an absorption tower and other carbon steel equipment, and the corrosion inhibitor does not need to be additionally added. Compared with the absorbent without the antioxidant, the oxidation rate of the organic amine carbon dioxide absorbent with the anti-oxidation additive is reduced by 80%, and the chemical corrosion resistance thereof is reduced by nearly 100%. According to the invention, the anti-oxidation additive has lower toxicity, can be used at higher temperature, and cannot lose own performance.

Description

technical field [0001] The invention relates to an antioxidant additive of an organic amine carbon dioxide absorber and a method for using the same. Background technique [0002] In the context of recent concerns about global warming and the strengthening of restrictions, it is imperative to reduce carbon dioxide emissions from coal-fired power plants. As a method of reducing the amount of carbon dioxide emissions, the reduction of the amount of carbon dioxide emissions by increasing the efficiency of power plants and the recovery of carbon dioxide using chemical absorbents have received much attention. [0003] As a specific chemical absorbent, organic amine absorbents are the most studied at present, which are used in most coal-fired power plants. The quality of the absorbent is one of the main determinants in the carbon dioxide capture process. Under the environment of flue gas from coal-fired power plants, the current absorbents are prone to oxidation, fly ash pollution...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCY02C10/06Y02A50/20Y02C20/40
Inventor 张艳伟葛学利倪建军乌晓江
Owner SHANGHAI BOILER WORKS
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