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Functionalized ionic liquid phase change system for capturing carbon dioxide and application of system

A technology of carbon dioxide and ionic liquid, which is applied in the direction of educts, inorganic chemistry, carbon compounds, etc., can solve the problems of difficult regeneration of absorbents and low carbon dioxide capture efficiency, so as to facilitate storage and treatment, promote industrialization, and avoid equipment corrosion Effect

Active Publication Date: 2019-08-20
HUAQIAO UNIVERSITY
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a functionalized ionic liquid phase change system for carbon dioxide capture and its application, which solves the low carbon dioxide capture efficiency and difficulty in absorbent regeneration in the above-mentioned background technology And other issues

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  • Functionalized ionic liquid phase change system for capturing carbon dioxide and application of system
  • Functionalized ionic liquid phase change system for capturing carbon dioxide and application of system
  • Functionalized ionic liquid phase change system for capturing carbon dioxide and application of system

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Embodiment 1

[0024] A functionalized ionic liquid phase change system for carbon dioxide capture in this embodiment is a three-phase system composed of functionalized ionic liquid diethylenetriaminetriazole ([DETA][Tz]), n-propanol and water. Elementary mixed system, wherein the total concentration of diethylenetriaminetriazole is 0.5-1mol / L, and the volume ratio of n-propanol to water is 5:5-8:2. The proportion in the mixed gas of carbon dioxide and nitrogen is 0-20%, and the absorption temperature is 30-60°C.

[0025] The ternary mixed system is a homogeneous transparent liquid solution before absorbing carbon dioxide, and changes into a liquid-liquid two-phase phase change system after absorbing carbon dioxide and being saturated, and the carbon dioxide is enriched in the water phase.

[0026] After absorbing carbon dioxide saturation, the carbon dioxide-enriched water phase can be regenerated by thermal desorption, the regeneration temperature is 100-120°C, the regeneration time is 80-...

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Abstract

The invention discloses a functionalized ionic liquid phase change system for capturing carbon dioxide and an application of the system. An absorbent is a ternary mixed system composed of a functionalized ionic liquid diethylenetriamine triazole ([DETA][Tz]), n-propyl alcohol and water, wherein the total concentration of the [DETA][Tz] is 0.5-1 mol / L, and the volume ratio of the n-propyl alcohol to the water is 5:5-8:2. The temperature of the system for absorbing carbon dioxide is 30-60 DEG C, and the regeneration temperature is 100-120 DEG C. The functionalized ionic liquid phase change system has a phase separation characteristic, can effectively reduce regeneration energy consumption of the technology, and also has efficient CO2 trapping performance. Compared with a conventional phase change absorbent, the system has greatest difference that the main absorbent is the functionalized ionic liquid, so that the defects that a conventional organic amine phase change body has large rich liquid viscosity and is difficult to regenerate can be overcome, and a wide application prospect is achieved.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide capture, and in particular relates to a functionalized ionic liquid phase change system for carbon dioxide capture and its application. Background technique [0002] Global climate change caused by greenhouse gases is one of the most significant environmental problems in the world today. carbon dioxide (CO 2 ) as the most important greenhouse gas, its control and emission reduction has been the focus of attention of various countries in recent years. Based on the fact that the current global energy structure is still dominated by fossil fuels, among many carbon emission reduction and control technologies, carbon capture and storage technology (CCS) is considered to have the most promising development prospects. The key to this technology is to convert CO 2 CO from energy systems such as thermal power plants 2 Separation from flue gas from concentrated emission sources. Ethanolamine (MEA...

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Application Information

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IPC IPC(8): B01D53/14C01B32/50
CPCB01D53/1475B01D2252/20415B01D2252/20436B01D2252/30C01B32/50Y02P20/151Y02P20/54Y02C20/40
Inventor 吕碧洪荆国华詹晓慧周作明
Owner HUAQIAO UNIVERSITY
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