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A reactive phase change co 2 Absorbent and its preparation method

An absorbent and reaction phase technology, applied in the field of reaction phase change CO2 absorbent and its preparation, can solve the problems of reducing energy consumption for capture, low reaction rate, limited phase contact area, etc., achieving high absorption efficiency, strong absorption capacity, The effect of good liquidity

Active Publication Date: 2020-09-22
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

solid-liquid reaction phase change CO 2 Absorbent absorbs CO 2 During the process, the solid phase absorbent passes through the CO 2 The reaction generates liquid-phase reactants. During regeneration, the adsorbed and saturated liquid-phase reactants will transform from liquid phase to solid phase, and the transformation will be accompanied by the release of a part of phase-change energy. This phase-change energy can supplement the energy required for heating the liquid phase. energy and therefore has a reduced CO 2 advantage of capturing energy consumption, but due to CO 2 The contact area with the solid phase is limited, and the solid-liquid reaction phase changes into CO 2 Absorbent has a technical problem of low reaction rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The reaction phase change CO provided by this embodiment 2 absorbent, the reaction phase changes CO 2 Absorbent comprises main absorbent and solvent, and described main absorbent is tetraethyl quaternary phosphonium salt benzimidazole [P 2222 ][Bnlm].

[0019] The solvent is 1-butyl-3-methylimidazolium hexafluorophosphate C 4 mimPF6.

[0020] The reaction phase changes to CO 2 In the absorbent, the mass percent concentration of the main absorbent is 50%.

[0021] This embodiment provides the reaction phase change CO 2 The preparation method of absorbent, comprises the steps:

[0022] Mix the main absorbent and solvent, magnetically stir, and ultrasonically oscillate to make a suspension to obtain a reactive phase change CO 2 absorbent.

[0023] The reaction phase changes to CO 2 In the absorbent, the mass percent concentration of the main absorbent is 30-70%.

[0024] The stirring speed is 100r / min, and the stirring time is 40min.

Embodiment 2

[0026] The reaction phase change CO provided by this embodiment 2 absorbent, the reaction phase changes CO 2 Absorbent comprises main absorbent and solvent, and described main absorbent is tetrabutyl quaternary phosphonium salt benzimidazole [P 4444 ][Bnlm].

[0027] The solvent is 1-butyl-3-methylimidazolium hexafluorophosphate C 4 mimPF6.

[0028] The reaction phase changes to CO 2 In the absorbent, the mass percent concentration of the main absorbent is 70%.

[0029] This embodiment provides the reaction phase change CO 2 The preparation method of absorbent, comprises the steps:

[0030] Mix the main absorbent and solvent, magnetically stir, and ultrasonically oscillate to make a suspension to obtain a reactive phase change CO 2 absorbent.

[0031] The reaction phase changes to CO 2 In the absorbent, the mass percent concentration of the main absorbent is 30-70%.

[0032] The stirring speed is 300r / min, and the stirring time is 10min.

Embodiment 3

[0034] The reaction phase change CO provided by this embodiment 2 absorbent, the reaction phase changes CO 2 Absorbent comprises main absorbent and solvent, and described main absorbent is tetraethyl quaternary phosphonium salt 2-cyanopyrrole [P 2222 ][2-CNPyr].

[0035] The solvent is silicone oil.

[0036] The reaction phase changes to CO 2 In the absorbent, the mass percent concentration of the main absorbent is 50%.

[0037] This embodiment provides the reaction phase change CO 2 The preparation method of absorbent, comprises the steps:

[0038] Mix the main absorbent and solvent, magnetically stir, and ultrasonically oscillate to make a suspension to obtain a reactive phase change CO 2 absorbent.

[0039] The reaction phase changes to CO 2 In the absorbent, the mass percent concentration of the main absorbent is 30-70%.

[0040] The stirring speed is 200r / min, and the stirring time is 20min.

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Abstract

The invention relates to a reaction phase change CO2 absorbent and a production method thereof, and belongs to the field of CO2 adsorption. According to the provided reaction phase change CO2 absorbent, the reaction phase change CO2 absorbent comprises a main absorbent and a solvent, wherein the main absorbent comprises quaternary phosphonium salt benzimidazole [Pnnnnn][Bnlm] or quaternary phosphonium salt 2-cyanopyrrole [Pnnnnn][2-CNPyr], in the [Pnnnnn][Bnlm] and the [Pnnnnn][2-CNPyr], n is 1 to 4. The reaction phase change CO2 absorbent has the advantages that the absorption capability is high, and the absorption efficiency is high.

Description

technical field [0001] The invention belongs to CO 2 Adsorption field, specifically related to a reactive phase change CO 2 Absorbent and method for its preparation. Background technique [0002] The growing problem of global warming caused by the greenhouse effect has attracted the attention of the whole world. The reduction of carbon dioxide emissions is urgent. Among the existing carbon capture technologies, chemical absorption is the most efficient method. The development of more efficient, environmentally friendly and energy-saving carbon dioxide absorbents has become a research topic. focus. solid-liquid reaction phase change CO 2 Absorbent absorbs CO 2 During the process, the solid phase absorbent passes through the CO 2 The reaction generates liquid-phase reactants. During regeneration, the adsorbed and saturated liquid-phase reactants will transform from liquid phase to solid phase, and the transformation will be accompanied by the release of a part of phase-ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
CPCB01D53/1475B01D53/1493B01D2252/2053B01D2252/40Y02A50/20Y02C20/40
Inventor 李小姗张立麒罗聪江伍凤李立伟
Owner HUAZHONG UNIV OF SCI & TECH
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