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Green carbon dioxide absorbent

A carbon dioxide, absorbent technology, applied in the direction of absorption, reagents, inorganic chemistry, etc., can solve the problems of difficult industrial process, high cost, and difficulty in fluidity to meet the convective absorption process, to improve absorption performance and reduce process energy consumption. Effect

Inactive Publication Date: 2010-05-05
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such ionic liquids have limitations such as high cost and high viscosity, making it difficult to be widely used in industrial processes.
Among the currently reported ionic liquids, the asymmetric tetraalkylammonium amino acid ionic liquid has a relatively small viscosity: about 30-60 mPa s at 25°C (Chem. Commun., 2008, 4: 505-507), but its fluidity It is still difficult to meet the needs of the convective absorption process; another scholar loads functional ionic liquids on solids to absorb acid gases (CN200510073345.0), which loses the advantages of liquid absorbents to a certain extent and limits its application range

Method used

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  • Green carbon dioxide absorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The experimental device for synthesizing ionic liquid is a three-neck flask. Tetramethylammonium hydroxide and glycine were dissolved in water at a ratio of 1:1, and stirred mechanically at room temperature for 48 hours until the pH of the solution was between 9 and 10. After the reaction was complete, most of the water was removed by rotary evaporation at 50°C, and then dried in a vacuum oven at 65°C for more than 48 hours, and the product was taken out after constant weight to obtain tetramethylammonium glycine ionic liquid.

[0028] Tetramethylammonium glycine ionic liquid and N-methyldiehexanolammonium were dissolved in water according to the mass ratio of 0.2:1, 0.5:1, and 1:1, respectively, and three absorbing solutes with a total mass fraction of 30% were formulated. agent.

[0029] Accurately weigh a certain amount of compound absorbent and put it into an absorption chamber, evacuate to a vacuum and maintain it for 5-10min. The absorption chamber is placed in ...

Embodiment 2

[0031] The experimental device for synthesizing ionic liquid is a three-neck flask. Dissolve tetraethylammonium hydroxide and glycine in water at a ratio of 1:1, and react with mechanical stirring at room temperature for 48 hours until the pH of the solution is between 9 and 10. After the reaction was complete, most of the water was removed by rotary evaporation at 50°C, and then dried in a vacuum oven at 65°C for more than 48 hours, and the product was taken out after constant weight to obtain tetraethylammonium glycine ionic liquid.

[0032] Dissolve tetraethylammonium glycine ionic liquid and N-methyldiehexanolammonium in water according to the mass ratio of 0.2:1, 0.5:1, and 1:1 respectively, and prepare three absorbing solutes with a total mass fraction of 30%. agent.

[0033] Accurately weigh a certain amount of compound absorbent and put it into an absorption chamber, evacuate to a vacuum and maintain it for 5-10min. The absorption chamber is placed in a 298K constant...

Embodiment 3

[0035] The experimental device for synthesizing ionic liquid is a three-neck flask. Dissolve tetramethylammonium hydroxide and lysine in water at a ratio of 1:1, and react with mechanical stirring at room temperature for 48 hours until the pH of the solution is between 9 and 10. After the reaction was complete, most of the water was removed by rotary evaporation at 50°C, and then dried in a vacuum oven at 65°C for more than 48 hours, and the product was taken out after constant weight to obtain tetramethylammonium lysine ionic liquid.

[0036] Tetramethylammonium lysine ionic liquid and N-methyldiehexanolammonium were dissolved in water according to the mass ratio of 0.2:1, 0.5:1, and 1:1 respectively, and the total mass fraction of three solutes were all 30%. absorbent.

[0037] Accurately weigh a certain amount of compound absorbent and put it into an absorption chamber, evacuate to a vacuum and maintain it for 5-10min. The absorption chamber is placed in a 298K constant t...

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Abstract

The invention relates to green carbon dioxide absorbent which is aqueous solution compounded from alkaline ionic liquid and organic amine, wherein the mass ratio of the alkaline ionic liquid to the organic amine is 0.2-1:1. The total mass concentration of the solute of the aqueous solution is 20-40 percent. The alkaline ionic liquid which is the functional ionic liquid is used as the additive and is compounded with the organic amine which is the traditional removing solvent to obtain the compound absorbent which can improve the acid gas absorption performance, reduce the process energy consumption and ensure the zero emission of the energy and has the characteristics of reutilization and economical efficiency.

Description

technical field [0001] The present invention relates to alkaline ionic liquid and CO 2 gas absorption. Background technique [0002] In recent decades, due to CO 2 Excessive emissions of the earth caused the temperature of the earth's surface to rise continuously, which brought great harm to the environment, and various natural disasters became more and more severe. The utilization process of oil, coal and natural gas will produce CO 2 Various syngas in chemical, biological, energy, metallurgical and other industries, hydrogen energy preparation gas, biorefining purge gas, metallurgical and power plant exhaust gas, etc. also contain different concentrations of CO 2 . CO removal in terms of production 2 It becomes an essential production process, reducing CO in terms of post-processing 2 The direct discharge of the pollutants is of great significance to the protection of the environment on which human beings depend. In addition, in the atmospheric environment in the na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14C01B31/20C01B32/50
CPCY02C10/06Y02A50/20Y02C20/40Y02P20/151
Inventor 张锋张志炳吴有庭王渊涛
Owner NANJING UNIV
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