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A two-phase amine absorbent for capturing carbon dioxide and its application

A carbon dioxide and absorbent technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of low absorption effect, rich liquid, two-phase amine, etc., to facilitate industrialization, ensure absorption capacity, reduce The effect of energy consumption

Active Publication Date: 2019-01-25
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no two-phase amine absorbent with good absorption effect and low amount of rich liquid to be regenerated.

Method used

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  • A two-phase amine absorbent for capturing carbon dioxide and its application
  • A two-phase amine absorbent for capturing carbon dioxide and its application
  • A two-phase amine absorbent for capturing carbon dioxide and its application

Examples

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Effect test

Embodiment 1

[0024] A two-phase amine absorbent for capturing carbon dioxide, according to the total concentration of diethylenetriamine and pentamethyldiethylenetriamine in water is 4 to 5mol / L, and diethylenetriamine and pentamethyldiethylene The molar ratio of triamine is 1:4. Diethylenetriamine and pentamethyldiethylenetriamine are mixed and dissolved in water to form a triplet of diethylenetriamine, pentamethyldiethylenetriamine and water. Subsystem DETA-PMDETA-H 2 O solution, which is a two-phase amine absorbent, is a homogeneous solution before absorbing carbon dioxide.

Embodiment 2

[0026] A two-phase amine absorbent for capturing carbon dioxide, according to the total concentration of diethylenetriamine and pentamethyldiethylenetriamine in water is 4 to 5mol / L, and diethylenetriamine and pentamethyldiethylene The molar ratio of triamine is 2:3, diethylenetriamine and pentamethyldiethylenetriamine are mixed and dissolved in water to form a triplet of diethylenetriamine, pentamethyldiethylenetriamine and water Subsystem DETA-PMDETA-H 2 O solution, which is a two-phase amine absorbent, is a homogeneous solution before absorbing carbon dioxide.

Embodiment 3

[0028] A two-phase amine absorbent for capturing carbon dioxide, according to the total concentration of diethylenetriamine and pentamethyldiethylenetriamine in water is 4 to 5mol / L, and diethylenetriamine and pentamethyldiethylene The molar ratio of triamine is 3:2. Diethylenetriamine and pentamethyldiethylenetriamine are mixed and dissolved in water to form a triplet of diethylenetriamine, pentamethyldiethylenetriamine and water. Subsystem DETA-PMDETA-H 2 O solution, which is a two-phase amine absorbent, is a homogeneous solution before absorbing carbon dioxide.

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Abstract

The invention discloses a two-phase amine absorbent for capturing carbon dioxide and the application thereof. The two-phase amine absorbent is a ternary component system formed by diethylenetriamine, pentamethyl diethylenetriamine and water. The total concentration of diethylenetriamine and pentamethyl diethylenetriamine in water is 4-5 mol / L, and the molar ratio of diethylenetriamine to pentamethyl diethylenetriamine is (1:4)-(4:1). The independent aqueous solutions of the two organic amines do not have phase separation ability after absorbing CO2; however, the two-phase amine absorbent consisting the ternary component system has phase separation ability, and the two-phase amine absorbent is a homogeneous solution before absorbing CO2 and is divided into two phases after absorbing CO2. After saturated absorption, CO2 is rich in water phase; after phase separation, it only needs to conduct thermal regeneration on solution rich in CO2, so that rich liquid amount required for regeneration is reduced greatly, regeneration energy consumption can be effectively reduced, efficient CO2 absorbability can be maintained, and application prospects are broad.

Description

technical field [0001] The invention relates to the technical field of carbon dioxide capture, in particular to a two-phase amine absorbent for capturing carbon dioxide and its application. Background technique [0002] Global warming poses severe challenges to human survival and social development, and is a major environmental problem that needs to be resolved urgently. To deal with global climate change, the key is to reduce greenhouse gases, especially carbon dioxide (CO 2 ) emissions. At the World Climate Conference held in 2009, the Chinese government solemnly promised that by 2020, CO emissions per unit of gross domestic product (GDP) 2 Compared with 2005, it has dropped by 40-45%, which has brought great challenges to related industries in our country. In many CO 2 Among emission reduction technologies, chemical absorption methods, especially organic amine absorption methods, have been applied in industry. This method utilizes CO 2 A reversible chemical reaction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
CPCB01D53/1475B01D53/1493B01D2252/20415Y02A50/20Y02C20/40
Inventor 荆国华周小斌吕碧洪周作明
Owner HUAQIAO UNIVERSITY
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