Absorbent and method for separating acid gases from gas mixture

A technology of mixing gas and acid gas, applied in the field, can solve the problems of strong corrosiveness, high alkalinity, strong ammonia smell and so on.

Inactive Publication Date: 2006-11-29
KOREA ELECTRIC POWER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] First, existing absorbents such as MEA have a large alkalinity (at 25°C, K is 3.3×10 -10 ), after reacting with carbon dioxide, more energy is required in the regeneration process, and it is highly corrosive to equipment
[0005] Second, most of the existing absorbents have a strong ammonia odor
[0006] Third, the carbon dioxide absorption method using existing absorbents has been studied for a long time, so there are many patent disputes when applying this absorption method
[0007] Fourth, existing absorbents, in absorbing CO from 2 When carbon dioxide is heated and removed in an aqueous solution, due to the formation of cyclic carbamate (carbamate) and urea (urea) type by-products (through the condensation of two molecules of amine and carbon dioxide), premature exposure to Thermal stress (stress), there is a problem that it cannot be used repeatedly for a long time

Method used

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  • Absorbent and method for separating acid gases from gas mixture
  • Absorbent and method for separating acid gases from gas mixture
  • Absorbent and method for separating acid gases from gas mixture

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0024] Experimental Example 1: Comparison of Alkalinity

[0025] Alkalinity is used to represent a measure of the ability to neutralize acid when it flows into an alkaline or a water system different from alkali. Hydroxide (OH - ), bicarbonate (HCO 3- ), carbonate (CO 3 2- )Wait. Base measurement is based on KS MISO9963-1.

[0026] Alkalinity of monoethanolamine (MEA) and sodium glycinate (SG) is indicated in the table below. It can be seen from Table 1 that the alkalinity changes little with temperature. In addition, the higher the concentration of monoethanolamine is, the higher the alkalinity is compared with sodium glycinate. Therefore, at the same concentration, the alkalinity of sodium glycinate is low, which can make it less corrosive.

[0027] 【Table 1】

[0028] Pilot projects

experiment example 2

[0029] Experimental example 2: Comparison of the unit absorption of carbon dioxide by each absorbent based on the temperature difference

[0030] figure 2 for measuring the equilibrium CO of the absorbent at atmospheric pressure 2Schematic diagram of the experimental setup for uptake. The measuring device is composed of a storage tank 21 for injecting an accurate amount of carbon dioxide at a certain temperature, and a reaction tank 22 for reacting carbon dioxide and an absorbent at a certain temperature. In order to maintain a certain temperature, the above-mentioned device is set in a Forced Convection Oven (OF-22) from Zeeiotech Company. An accurate amount of absorbent is injected through a pump (Series 1; manufactured by Lab Alliance Co., Ltd.) 24. In order to make the absorbent 25 and carbon dioxide react smoothly, four baffles (baffles) 26 are installed in the reaction tank 22 for uniform mixing. . In the reaction tank 22, thermometers T are installed on both the ga...

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PUM

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Abstract

The provided method to separate acid gas from the mixed with the absorbent contained sodium glycinate comprises contacting the absorbent and mixed gas for complete separation. This invention increases the unit absorptivity as temperature variable, and improves regeneration feature.

Description

technical field [0001] The present invention relates to the separation absorbent of the acid gas contained in the mixed gas and the method for separating the acid gas from the mixed gas. 2 、H 2 A separation absorbent for removing acid gas from a mixed gas of acid gas such as S, COS, and a method for separating acid gas from a mixed gas using sodium glycinate as a novel absorbent. Background technique [0002] With the development of industry, the problem of global warming caused by the increase of the concentration of carbon dioxide in the atmosphere has become more and more prominent. For this reason, solutions to these problems are urgently needed. The use of fossil fuels such as coal, petroleum, and liquefied natural gas (LNG) used in the energy industry is the largest cause of the increase in the concentration of carbon dioxide in the atmosphere. Along with the use of fossil fuels, technology development and research on reducing the concentration of carbon dioxide in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCB01D53/1493B01D53/1456B01D53/14
Inventor 张庆龙严熙文金东华金俊翰闵丙武李承哲
Owner KOREA ELECTRIC POWER CORP
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