Absorption of Acid Gases: Evaluation of Thermodynamic and Kinetic Aspects of an Aqueous Solution of 2-(2-Diethylaminoethoxy) Ethanol and 1,3-Dimethyl-2-imidazolidinone

被引：0
作者：
Coquelet, Christophe [1 ,2 ]
Valtz, Alain [1 ]
de Meyer, Frederick [1 ,3 ]
机构：
[1] Mines Paris PSL Univ, Ctr Energy, Environm, Proc CEEP, F-77305 Fontainebleau, France
[2] Univ Toulouse, IMT Mines Albi, CNRS UMR, F-81013 Albi 9, France
[3] TotalEnergies SE, OneTech Gas & Low Carbon CO2 & Sustainabil R&D, F-92078 Paris, France
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2025年 / 64卷 / 04期
关键词：
CARBON-DIOXIDE; CO2; SOLUBILITY; NATURAL GASES; MIXTURES; SOLVENT; WATER;
D O I：
10.1021/acs.iecr.4c03875
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The removal of CO2 and H2S from a gas by absorption with an aqueous alkanolamine solution is an energy-intensive process. The addition of a physical cosolvent might lower the regeneration energy but also affects the thermodynamics and kinetics of acid gas absorption. In this work, we study the impact on the thermodynamics and kinetics of CO2 and H2S absorption of the addition of 1,3-dimethyl-2-imidazolidinone (DMI) to the aqueous 2-(2-diethylaminoethoxy)ethanol (DEAE-EO) solvent. A comparison is made with the impact of DMI on an aqueous methyldiethanolamine (MDEA) solvent. In all cases, DMI reduced the solubility and the absorption rate of the acid gases. DMI also reduced the initial kinetic H2S/CO2 selectivity, although this effect seems much more pronounced in aqueous MDEA than in aqueous DEAE-EO. The equilibrium thermodynamic H2S/CO2 selectivity is higher in the presence of DMI.
引用
收藏
页码：2416 / 2432
页数：17
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