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A rapidly phase-separated absorbing co 2 Preparation of polyamino acid ionic liquid type phase separation absorbent and its use method

A polyamino acid and ionic liquid technology, which is applied in the field of liquid absorption of CO2 and CO2 absorption, can solve the problems of high viscosity of ionic liquids, increased regeneration energy consumption, and reduced absorption efficiency, and achieve strong absorption capacity, low regeneration energy consumption, and simple operation Effect

Active Publication Date: 2020-08-25
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the viscosity of ionic liquids is relatively high, especially the functionalized ionic liquids, which are difficult to absorb CO 2 After that, the viscosity increased sharply, and the CO 2 Reduced absorption efficiency
Combining ionic liquids with water can reduce their viscosity, however, during the regeneration process of the absorbent, since heating the solvent consumes a lot of energy, the regeneration energy consumption is greatly increased

Method used

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  • A rapidly phase-separated absorbing co <sub>2</sub> Preparation of polyamino acid ionic liquid type phase separation absorbent and its use method
  • A rapidly phase-separated absorbing co <sub>2</sub> Preparation of polyamino acid ionic liquid type phase separation absorbent and its use method
  • A rapidly phase-separated absorbing co <sub>2</sub> Preparation of polyamino acid ionic liquid type phase separation absorbent and its use method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0034] 1 Synthetic polydimethyldiallylammonium chloride (PDADMAC)

[0035] Take by weighing [66.6688g, 247.41mmol] dimethyl diallyl ammonium chloride solution, [0.6g, 2.63mmol] initiator ammonium persulfate (K 2 S 2 o 8 ), [0.0025g, 7.5×10 -3 [mmol] complexing agent disodium ethylenediaminetetraacetic acid (EDTA-2Na), [0.928g, 10mmol] chain transfer agent thioglycolic acid (TGA) were dissolved in 10mL ultrapure water. At room temperature, add the sample to mix, stir magnetically, and pass N 2 . After 20 minutes, it was transferred to a 70°C water bath. After 24 hours of reaction, the temperature was raised to 80°C, and after maintaining for 6 hours, the reaction was stopped and cooled to room temperature. Concentrate by rotary evaporation, then dry in vacuo for 48h. Get the first step product.

[0036] 2 Preparation of P[DADMAC][OH] (ion exchange)

[0037]Weigh [8.0835 g, 0.05 mol] of polydimethyldiallylammonium chloride (PDADMAC), add 40 mL of ultrapure water to disso...

Embodiment 2

[0049] 1 CO of polyglycine ionic liquid P[DADMAC][Gly] aqueous solution absorbent 2 Absorption and Phase Separation

[0050] Prepare 3mol / L P[DADMAC][Gly] aqueous solution, take 6mL absorbent, and pass CO into it 2 . Record access to CO 2 Before and after the quality and pH value, and observe the phase separation phenomenon.

[0051] 2 rich CO 2 Solid phase desorption regeneration

[0052] The phase-separated solid and liquid phases were separated by centrifugation, and the solid phase was taken out, while the liquid phase was left untreated. Heat the solid phase to 120°C, take it out after 4 hours of heat preservation, and dissolve the desorbed solid phase in the original liquid phase again. CO again 2 Absorption, solid phase separation, desorption regeneration. cycle.

[0053] 3 P[DADMAC][Gly]-Fe 3 o 4 Absorbent preparation

[0054] Prepare 3mol / L P[DADMAC][Gly] aqueous solution, take 6mL absorbent, add 1mg Fe 3 o 4 Nanoparticles. Shake at a constant temperatu...

example 3

[0060] 1 CO of polytryptophan ionic liquid P[DADMAC][Trp] aqueous solution absorbent 2 Absorption and Phase Separation

[0061] Prepare 0.5mol / L P[DADMAC][Trp] aqueous solution, take 6mL absorbent, and pass CO into it 2 . Record access to CO 2 Before and after the quality and pH value, and observe the phase separation phenomenon.

[0062] 2 rich CO 2 Solid phase desorption regeneration

[0063] The phase-separated solid and liquid phases were separated by centrifugation, and the solid phase was taken out, while the liquid phase was left untreated. Heat the solid phase to 120°C, take it out after 4 hours of heat preservation, and dissolve the desorbed solid phase in the original liquid phase again. CO again 2 Absorption, solid phase separation, desorption regeneration. cycle.

[0064] 3 P[DADMAC][Trp]-Fe 3 o 4 Absorbent preparation

[0065] Prepare 0.5mol / L P[DADMAC][Trp] aqueous solution, take 6mL absorbent, add 2mg Fe 3 o 4 Nanoparticles. Shake at a constant te...

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Abstract

The present invention provides a phase-separated CO2 absorbent system. According to the present invention, the absorbent can be subjected to phase separation to obtain a CO2-rich solid phase and a CO2-poor liquid phase after the absorbent captures CO2, and only the CO2-rich solid phase is subjected to heating desorption, such that the energy consumed by the heating of the solvent can be avoided; a polyamino acid ionic liquid and magnetic nano-ions (Fe3O4) are compounded, and the phase separation can occur after CO2 is captured; by using the action of an external magnetic field, the CO2-rich solid phase is rapidly settled and is separated from the liquid phase so as to save the time and improve the efficiency; and compared to the traditional absorbent, the absorbent of the present invention has advantages of regeneration and low energy consumption.

Description

technical field [0001] The present invention relates to CO 2 The field of absorption technology, in particular the absorption of CO by liquids 2 technology field. Background technique [0002] With the rapid development of world economic globalization, diversification and regional economic integration, the global climate disaster caused by climate warming has made the world rethink the traditional economic development model. The carbon emissions produced by the traditional high-carbon economic model characterized by "high energy consumption, high pollution, and high emissions" and the global climate change it brings have threatened the overall welfare of the current and future human society. Accelerating the transformation of the economic development model has already become an inevitable trend of global economic development. my country's CO in recent years 2 The current situation that the emissions rank first in the world makes my country have to face the pressure of pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
CPCB01D53/1475B01D53/1493B01D2252/10B01D2252/204B01D2252/205B01D2252/30Y02A50/20Y02C20/40
Inventor 陈学琴郭慧江兵兵陈陆枫宋琼芳
Owner HUBEI UNIV