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Solvent for capturing CO2 and preparation method of solvent for capturing CO2

A technology of solvent and catalyst, which is applied in the field of CO2 capture solvent and its preparation, can solve the problems of high desorption energy consumption, easy volatilization, large DMC circulation volume, etc., achieves wide application prospects, large absorption capacity, and simple and easy synthesis method line effect

Active Publication Date: 2016-08-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although compared with traditional absorbents, the energy consumption of the DMC absorption and capture process can be reduced by more than 10-20%, but some weaknesses are still exposed; such as DMC has a low boiling point, is easy to volatilize, DMC has a large amount of circulation, and desorption energy consumption still higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 108g of dimethyl carbonate and 94g of diethyl carbonate, then add 43g of ethylene glycol, 27g of butanediol, and then add 0.2g of titanium dioxide (TiO 2 ), the reaction was stirred at 120kPa and 110°C for 3h, and the methanol was removed to obtain CO 2 Solvent.

[0017] The solvent obtained was measured, and the measured molecular weight was 266, the viscosity was 5.33 mPa.s, and the density was 1.12 g / cm3. Use this solvent to absorb CO at 25°C and 0.5MPa 2 , CO 2 The solubility in it is 55.6gCO 2 / g solvent.

Embodiment 2

[0019] Take 86g ethyl methyl carbonate and 122g propylene carbonate, then add 40g ethylene glycol, 32g butanediol, and then add 0.1g aluminum oxide (Al 2 O 3 ) And 0.2g zinc oxide (ZnO), stirred and reacted at 110kPa, 130℃ for 3h, stripped off methanol, obtained for CO absorption 2 Solvent.

[0020] Measure the obtained solvent, the measured molecular weight is 289, viscosity is 6.24mPa.s, density is 1.18g / cm 3 . Use this solvent to absorb CO at 25°C and 0.5MPa 2 , CO 2 The solubility in it is 64.3gCO 2 / g solvent.

Embodiment 3

[0022] Take 58g of dimethyl succinate and 144g of dimethyl carbonate, then add 45g of ethylene glycol, 35g of butanediol, and then add 0.1g of tetrabutylammonium bromide (C 16 H 36 BrN) and 0.1g cetyltrimethylammonium bromide quaternary ammonium salt (C 19 H 42 BrN), stirred and reacted at 125kPa, 155°C for 3h, and removed methanol to obtain CO absorption 2 Solvent.

[0023] Measure the obtained solvent, the measured molecular weight is 308, viscosity is 6.24mPa.s, density is 1.18g / cm 3 . Use this solvent to absorb CO at 25°C and 0.5MPa 2 , CO 2 The solubility in it is 71.3gCO 2 / g solvent.

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Abstract

The invention discloses a solvent for capturing CO2 and a preparation method of the solvent for capturing the CO2 and belongs to the technical field of environmental protection and carbon emission reduction. The molecular weight, the viscosity and the density of the solvent are 190-370, 0.9-6 mPa s and 0.9-1.2 g / cm<3> respectively. The preparation method includes enabling ester compounds and aliphatic diol compounds serving as raw materials to react for 10 seconds to 10 hours under catalysis of catalysts under the pressure of 10-1000 kPa and at the temperature of 50-300 DEG C so as to obtain the solvent for capturing the CO2. The solvent for capturing the CO2 is large in absorptive capacity, and 50-100 g of CO2 can be dissolved in per g of solvent. The solvent is simple and feasible in synthetic method and has a promising application prospect in the technical field of environmental protection and carbon emission reduction.

Description

Technical field [0001] The invention belongs to the technical field of environmental protection and carbon emission reduction, and specifically relates to a method for capturing CO 2 The solvent and its preparation method. Background technique [0002] Due to CO 2 The global climate warming effect caused by excessive emissions has aroused widespread concern around the world, and carbon emissions reduction brooks no delay. CO 2 The capture, storage, and reuse technology (CCS / CCUS) is considered the fastest and most effective way to reduce carbon emissions. Current CO 2 The capture and separation methods include pre-combustion capture, post-combustion capture and oxygen-enriched combustion, among which CO in the gas is captured before combustion 2 High content and low energy consumption for capture have great advantages. With the development of integrated gasification combined cycle power generation technology (IGCC), IGCC and pre-combustion CO 2 Combination of capture technology ...

Claims

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Application Information

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IPC IPC(8): B01D53/14
CPCB01D53/1418B01D53/1475B01D53/1493B01D2252/202B01D2252/2023B01D2252/205B01D2257/504Y02A50/20Y02C20/40
Inventor 汤志刚贺志敏郭栋费维扬陈健赵志军
Owner TSINGHUA UNIV
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