Carbon dioxide absorbent and method for regenerating carbon dioxide absorbent

A carbon dioxide and absorbent technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve problems such as corrosion of carbon dioxide capture devices, loss of carbon dioxide absorbents, difficulty in capturing carbon dioxide, etc., and achieve excellent carbon dioxide absorption and regeneration Effects of reduction in capacity, viscosity and heat capacity, and reduction in regeneration temperature

Inactive Publication Date: 2017-01-04
GWANGJU INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, in the case of post-combustion carbon dioxide capture such as in power plants, it is necessary to handle low-concentration carbon dioxide containing nitrogen, so it is difficult to capture carbon dioxide
[0006] In the case of carbon dioxide absorbers based on aqueous amine solutions such as monoethanolamine aqueous solutions, when the content of monoethanolamine increases, there is a possibility that the carbon dioxide capture device will corrode
In addition, since a large amount of energy is required to regenerate the carbon dioxide absorbent, and the carbon dioxide absorbent is lost, there are problems in terms of process cost and efficiency.

Method used

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  • Carbon dioxide absorbent and method for regenerating carbon dioxide absorbent
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  • Carbon dioxide absorbent and method for regenerating carbon dioxide absorbent

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0078] The carbon dioxide absorption amount and absorption time of the diamine compound, and the regeneration amount and regeneration time of carbon dioxide, which vary according to the concentration of the polar aprotic solvent, were measured.

[0079] Changes in the amount of carbon dioxide absorbed and regenerated were measured while the molar ratio of the diamine compound and the protic solvent was fixed and the molar ratio of the polar aprotic solvent was increased.

[0080] In this case, N,N-diethylpropane-1,3-diamine (N,N-diethylpropane-1,3-diamine) was used as the diamine compound.

[0081] In this case, N-methylpyrrolidone (NMP) was used as the polar aprotic solvent.

[0082] In this case, water was used as the protic solvent.

[0083] At this time, the ratio of the diamine compound, NMP, and water is a molar ratio.

[0084] At this time, 50 ml of carbon dioxide was supplied per minute in the absorption step.

[0085] Absorption of carbon dioxide was carried out at...

experiment example 2

[0092] The carbon dioxide absorption amount and absorption time of the diamine compound and the regeneration amount and regeneration time of carbon dioxide were measured according to the protic solvent concentration.

[0093] Except that under the condition that the molar ratio of the diamine compound and the polar aprotic solvent is fixed and the molar ratio of the protic solvent is increased, changes in the amount of carbon dioxide absorbed and regenerated are measured, and the rest are the same as those in the experiment. The reaction was carried out under the same conditions as Example 1.

[0094] figure 2 It is a graph showing the absorption and regeneration concentration of carbon dioxide according to time measured in Experimental Example 2.

[0095] refer to figure 2 , it can be found that under the carbon dioxide absorption conditions at 30°C and the regeneration conditions of the carbon dioxide absorbent at 90°C, as the content of water as a protic solvent increas...

experiment example 3

[0099] In Examples 1 and 2 and Comparative Example 1, the absorption amount and absorption time of carbon dioxide of the diamine compound, and the regeneration amount and regeneration time of carbon dioxide were repeatedly measured.

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Abstract

In addition, a method for regenerating a carbon dioxide absorbent according to the present disclosure includes a carbon dioxide absorbent including a diamine compound including primary and tertiary amines, a polar aprotic solvent and a protic solvent absorbing carbon dioxide, and removing the carbon dioxide by heating the carbon dioxide-absorbed carbon dioxide absorbent.

Description

technical field [0001] The invention relates to a carbon dioxide absorbent and a regeneration method for the carbon dioxide absorbent. [0002] More specifically, according to the carbon dioxide absorbent and the regeneration method of the carbon dioxide absorbent of the present invention, the carbon dioxide absorbent includes a diamine compound, a polar aprotic solvent, and a protic solvent, so that the viscosity and heat capacity of the carbon dioxide absorbent are reduced, and the carbon dioxide absorbent The regeneration temperature is lowered, thereby improving energy efficiency. Background technique [0003] Climate change occurs due to global warming as greenhouse gas emissions increase. [0004] In particular, the main cause of global warming is carbon dioxide, which accounts for more than 70% of the emitted greenhouse gases. [0005] Since power plants using fossil fuels mainly emit the above-mentioned carbon dioxide, it is important to capture carbon dioxide by a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCB01D53/1425B01D53/1475B01D53/1493B01D2252/20431B01D2252/20421B01D2252/504B01D2252/20468B01D2252/604B01D2252/2041B01D2258/0283Y02A50/20Y02C20/40
Inventor 朴志雄R·拉扎曼妮卡姆金炯秀
Owner GWANGJU INST OF SCI & TECH
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