Preparation and performance analysis of non-aqueous absorbents based on alcohol ether organic compounds for CO<sub>2</sub> capture

Yi Wang; Yucong Ge; Li Yang; Fang Liu; Qingfang Li; Yi Li; Kunlei Liu

doi:10.1016/j.cjche.2025.07.019

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Preparation and performance analysis of non-aqueous absorbents based on alcohol ether organic compounds for CO₂ capture

Updated：2026-02-12

- Preparation and performance analysis of non-aqueous absorbents based on alcohol ether organic compounds for CO₂ capture
- Chinese Journal of Chemical Engineering Vol. 88, Issue 12, Pages: 284-295(2025)
- Affiliations：
  
  1. School of Low-carbon Energy and Power Engineering, China University of Mining and Technology,Xuzhou,China,221116
  2. Sinopec Petroleum Engineering Co., Ltd.,Dongying,China,257000
  3. University of Kentucky, Center for Applied Energy Research, 2540 Research Park Drive,KY,Lexington,USA,40511
  4. University of Kentucky, Department of Mechanical Engineering,KY,Lexington,USA,40506
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2025.07.019
  CLC：
- Published：2025
- Accepted：
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capture[J]. 中国化学工程学报, 2025, 88(12): 284-295.
DOI：

capture[J]. 中国化学工程学报, 2025, 88(12): 284-295. DOI： 10.1016/j.cjche.2025.07.019.

摘要

Abstract

MEA aqueous solution is widely utilized as an absorbent in chemical absorption processes. However

it is challenged by many disadvantages

including low regeneration capacity and high energy consumption during regeneration. In this study

new no-aqueous MEA absorbents were prepared using alcohol ether organic solvents

including proprylene glycol monomethyl ether (PGME)

ethylene glycol butyl ether (EGBE)

poly (ethylene glycol) dimethyl ether (NHD) and diethylene glycol monoethyl Ether (DGME). Then the performance of the absorbents was assessed through a series of experiments and based on the results

a comparison was made between the non-aqueous absorbents to the conventional absorbent (30% (mass) MEA aqueous solution). It was found that the organic solvent system presented a higher CO

removal efficiency than the MEA-H

O system in the first 350 s

with the maximum enhancement ranging from 5.16% to 14.36%. While NHD improved the CO

loading but reduced the regeneration efficiency. Except for the MEA-NHD system

all the other no-aqueous absorbents possessed a better regeneration efficiency than the MEA aqueous solution

which offers them the potential for industrial application. According to the data from NMR and FTIR analysis

after CO

absorption

the products in the MEA-EGBE and MEA-DGME systems were mainly found in the lower phase

the other phase was mainly organic solvents. Therefore

only the lower pha

se needs to be treated during desorption

with the upper phase being recycled directly

thus reducing energy consumption. The use of alcohol ether organic solvents can improve the CO

capture performance of absorbents to a certain extent and enhance their regeneration ability

providing a new direction for the subsequent research of non-aqueous absorbents.

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Preparation and performance analysis of non-aqueous absorbents based on alcohol ether organic compounds for CO2 capture

DOI：10.1016/j.cjche.2025.07.019

摘要

Abstract

关键词

Keywords

references

Preparation and performance analysis of non-aqueous absorbents based on alcohol ether organic compounds for CO₂ capture