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Compound decarburization solution for recovering carbon dioxide in gas mixture

A technology of carbon dioxide and mixed gas, applied in the direction of inorganic chemistry, through absorption, carbon compounds, etc., can solve the problem of insufficient decarburization ability of decarburization solution, and achieve the effect of large absorption capacity and low desorption temperature

Active Publication Date: 2007-12-26
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to improve the problem of insufficient decarburization ability of the above decarburization solution by adding a new type of solvent as a component, and the component acts in combination with other components, and can have better recycling efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 is a carbon dioxide recovery device in a flue gas in Zhejiang

[0019] Raw material gas: 30000Nm 3 / h, composition: CO 2 : 9.5%; O 2 : 7.0%; H 2 O: 11.0%; N 2 : 72.0%; CO: 1.0%; trace amounts of sulfides and nitrogen oxides. The average temperature of the absorption tower is 50°C, and the average temperature of the desorption tower is 105°C.

[0020] CO 2 Recycling volume: 30,000 tons / year or 2200Nm 3 / h, purity 99% (dry basis).

[0021] Circulation volume of composite decarburization solution: 120Nm 3 / h, composition: the main absorption component hydroxyethyl ethylene diamine (AEE), the content of which (all refer to the mass percentage) is 25%. The absorption aid component 2-amino-2-methyl-1-propanol (AMP) has a content of 10%; N-methyldiethanolamine (MDEA) has a content of 5%. The activating component monoethanolamine (MEA) has a content of 5%; piperazine (PZ) has a content of 5%. The corrosion inhibitor is sodium aluminate with a content of 0.07%. The antioxi...

Embodiment 2

[0022] Example 2 A carbon dioxide recovery device in Heilongjiang

[0023] Raw material gas: 12000Nm 3 / h, composition: CO 2 :10.25%; O 2 : 6.8%; H 2 O: 9.1%; N 2 : 75.0%; CO: 1.0%; trace amounts of sulfides and nitrogen oxides. The average temperature of the absorption tower is 50°C, and the average temperature of the desorption tower is 105°C.

[0024] CO 2 Recycling volume: 66Nm 3 / h, purity 98.5% (dry basis).

[0025] Circulation volume of composite decarburization solution: 120Nm 3 / h, composition: the main absorption component hydroxyethyl ethylene diamine (AEE), the content of which is 25%. The absorption aid component 2-amino-2-methyl-1-propanol (AMP), whose content is 5%; N-methyldiethanolamine (MDEA), whose content is 5%; triethanolamine (TEA), which The content is 5%. The content of the activated component monoethanolamine (MEA) is 4%; the content of diethanolamine (DEA) is 3%; and the content of piperazine (PZ) is 3%. The corrosion inhibitor is sodium aluminate with a ...

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Abstract

The invention belongs to the gas separation technology area, it relates to a decarbonization solution which recycles or removes the carbon dioxide gas from the mixed gas which contains carbon dioxide, said invention specially relates to an ethoxyl ethylenediamine decarbonization solution. Its characteristic lies in: the invention has designed a new compound decarbonization solution which is composed of the main absorption component, the aid absorption component, the activation component, the corrosion inhibitor, the oxidation inhibitor and the water. Among, the main absorption component is AEE, the aid absorption component is AMP, MDEA and TEA, the activation component is MEA, DEA and PZ, the corrosion inhibitor is vitriol sour sodium, the oxidation inhibitor is the sodium sulfite and the cupric acetate. The effect and the profit of the invention are that it can be used in recycling many kinds of chemical industry reaction exhaust, the carbon dioxide of the combustion flue gas and the mixed gas, may also used in removing the carbon dioxide of town gas, the natural gas and so on, the merit of the decarbonization fluid is that the absorption capacity is big, purification is high, desorption rate is big, regeneration energy consumption is low.

Description

Technical field [0001] The invention belongs to the technical field of gas separation, and relates to a decarburization solution for recovering or removing carbon dioxide gas from a mixed gas containing carbon dioxide, and in particular to a hydroxyethylethylenediamine decarburization solution. Background technique [0002] As we all know, carbon dioxide is a greenhouse gas. In recent years, as countries around the world pay attention to the global warming effect, the issue of carbon dioxide emissions has attracted worldwide attention. The separation methods of carbon dioxide are mainly divided into: physical absorption method, chemical absorption method and biological method. The first two methods are mainly used at present. The physical absorption method needs to be carried out under high pressure, so this method is mainly suitable for gas sources with higher carbon dioxide content; while the chemical absorption method can be carried out under normal pressure or lower pressure,...

Claims

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Application Information

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IPC IPC(8): B01D53/14B01D53/62C01B31/20C01B32/50
CPCY02C10/04Y02C10/06Y02A50/20Y02C20/40Y02P20/151
Inventor 盖群英张永春周锦霞宋微
Owner DALIAN UNIV OF TECH
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