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Non-aqueous amine solution for capturing carbon dioxide in mixed gas

A non-water-based amine and carbon dioxide technology, applied in the direction of inorganic chemistry, carbon compounds, non-metallic elements, etc., can solve the problems of reduced regeneration effect, low absorption capacity, strong corrosion, etc. small effect

Pending Publication Date: 2020-12-29
SINOPEC NANJING RES INST OF CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the absorbent uses water as a solvent, it has the following disadvantages: (1) The absorption capacity is low, and the absorption capacity of the amine-based aqueous solution is greatly affected by the ionization balance of the amine component in water; (2) It is highly corrosive and absorbs carbon dioxide. The final rich liquid is prone to ionization, causing corrosion of equipment and pipelines; (3) The regeneration energy consumption is high, because the boiling point of water is low and the heat capacity is large, a large amount of heat needs to be consumed in the regeneration process, thereby reducing the regeneration reaction heat utilization efficiency
However, the following problems still exist in the field of non-aqueous decarburization solution development at present: (1) the solvent components are mostly alcohol and ether systems, and the solvation effect is poor; (2) the active component is single and cannot form a composite absorption effect; ( 3) The regeneration effect is reduced, and the effective absorption load is reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The method of the present embodiment has the following steps:

[0028] (1) Prepare non-water-based amine solution, the mass composition is as follows: monoethanolamine: 5.7%, diethylenetriamine: 5%, dimethyl sulfoxide: 80%, N,N-diisopropylethylamine: 1.5% , triethylenetetramine: 4%, 2-amino-2-methyl-1-propanol: 2%, monoethanolamine monohydrogen phosphate: 1.5%, dilauryl thiodipropionate: 0.1%, benzo Triazole: 0.1%, monoethanolamine phosphate: 0.1%;

[0029] (2) Prepare contrast solution, the mass composition is as follows: monoethanolamine: 20%, water 80%;

[0030] (3) Measure the saturated carbon dioxide absorption capacity and the initial carbon dioxide absorption rate of two kinds of solutions respectively, the results show that the saturated carbon dioxide absorption capacity of the non-water-based amine solution is 1.31 times that of the contrast solution, and the initial carbon dioxide absorption rate is 1.27 times that of the contrast solution;

[0031] (4) Mea...

Embodiment 2

[0036] The method of the present embodiment has the following steps:

[0037] (1) prepare non-water-based amine solution, the mass composition is as follows: monoethanolamine: 9.2%, methyldiethanolamine: 6.9%, N-methylpyrrolidone: 70%, 1-amino-2-propanol: 4%, two (2-Hydroxypropyl)amine: 4.5%, Diethylenetriamine: 1.5%, N-Ethylpiperidine: 2%, Monoethanolamine Monohydrogen Phosphate: 1.5%, Dilauryl Thiodipropionate : 0.1%, p-toluenethiourea: 0.15%, tributyl phosphate: 0.15%;

[0038] (2) Prepare contrast solution, the mass composition is as follows: monoethanolamine: 30%, water 70%;

[0039] (3) Measure the saturated carbon dioxide absorption capacity and the initial carbon dioxide absorption rate of two kinds of solutions respectively, the results show that the saturated carbon dioxide absorption capacity of the non-water-based amine solution is 1.28 times that of the contrast solution, and the initial carbon dioxide absorption rate is 1.57 times that of the contrast solution; ...

Embodiment 3

[0045] The method of the present embodiment has the following steps:

[0046] (1) Prepare non-water-based amine solution, the mass composition is as follows: monoethanolamine: 10.5%, dimethyl sulfoxide: 50%, N-methylpyrrolidone: 30%, N,N-diisopropylethylamine: 1.5 %, triethylenetetramine: 2%, 2-amino-2-methyl-1-propanol: 2%, N-ethylpiperidine: 2%, monoethanolamine dihydrogen phosphate: 1.7%, tert-butyl Hydroquinone: 0.1%, Benzotriazole: 0.1%, Tributyl Phosphate: 0.1%;

[0047] (2) Prepare contrast solution, the mass composition is as follows: monoethanolamine: 20%, water 80%;

[0048] (3) Measure the saturated carbon dioxide absorption capacity and initial carbon dioxide absorption rate of two kinds of solutions respectively, the result shows, the saturated carbon dioxide absorption capacity of non-aqueous amine solution is 1.17 times of contrast solution, and initial carbon dioxide absorption rate is 1.29 times of contrast solution;

[0049] (4) Measure the initial carbon d...

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Abstract

The invention belongs to the technical field of gas separation, and relates to a non-aqueous amine solution for capturing carbon dioxide in mixed gas; the solution is different from a traditional carbon dioxide capturing solution, the used solvent is not water but an organic solvent, and meanwhile, corresponding active components, an absorption rate promoter, an absorption capacity enhancer, a regeneration rate promoter, a regeneration lean enhancer, an antioxidant, a corrosion inhibitor and an auxiliary agent are compatible for the organic solvent. The method provided by the invention is relatively strong in solvation effect, low in regeneration energy consumption, high in absorption capacity and high in speed, has certain oxidation resistance and small corrosion, and has a good application prospect in the field of carbon dioxide capture.

Description

technical field [0001] The invention belongs to the technical field of gas separation, specifically, it is a non-water-based amine solution for capturing carbon dioxide in a mixed gas. Significantly improves the CO2 capture performance of the absorption liquid while reducing the energy required for regeneration. Background technique [0002] Since the industrial revolution, human beings have consumed more and more fossil energy, resulting in higher and higher levels of greenhouse gases in the atmosphere. According to the report of the United Nations Intergovernmental Panel on Climate Change (IPCC), greenhouse gases produced by human activities have brought about significant global warming effects. In December 2015, nearly 200 parties to the "United Nations Framework Convention on Climate Change" (UNFCCC) unanimously adopted the "Paris Agreement" at the Paris Climate Change Conference. Limit global temperature rise to 1.5 degrees Celsius above pre-industrial levels. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/18B01D53/14C01B32/50
CPCB01D53/18B01D53/1475C01B32/50B01D2252/204B01D2252/20478B01D2252/20415Y02C20/40Y02P20/151
Inventor 毛松柏郭本帅陈曦汪东季燕叶宁
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD
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