New method of kinetic modeling for CO2 absorption into blended amine systems: A case of MEA/EAE/3DEA1P trisolvent blends

被引：33

作者：

Zheng, Wenchao ^{[1
]}

Luo, Qinlan ^{[1
]}

Liu, Sen ^{[1
]}

Wang, Nan ^{[1
]}

Luo, Xiao ^{[1
]}

Gao, Hongxia ^{[1
]}

Liang, Zhiwu ^{[1
]}

机构：

[1] Hunan Univ, Minist Educ, Engn Res Ctr Adv Catalysis,Joint Int Ctr CO2 Capt, Coll Chem & Chem Engn,Prov Hunan Key Lab Cost Eff, Changsha 410082, Hunan, Peoples R China

来源：

AICHE JOURNAL | 2022年 / 68卷 / 06期

基金：

中国国家自然科学基金;

关键词：

AIMD; CO2; absorption; reaction kinetic; stopped-flow technology; trisolvent blends; CARBON-DIOXIDE; AQUEOUS-SOLUTIONS; 2-AMINO-2-METHYL-1-PROPANOL AMP; MONOETHANOLAMINE MEA; CARBAMATE FORMATION; TEMPERATURE-RANGE; TERTIARY-AMINES; 298-313; K; CAPTURE; ALKANOLAMINES;

D O I：

10.1002/aic.17628

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In order to establish an accurate kinetic model for the aqueous amine blends, monoethanolamine (MEA), 2-(ethylamino) ethanol (EAE), and 3-(diethylamino)-1-propanol (3DEA1P) have been chosen as a typical CO2 absorption trisolvents. The reaction kinetics of aqueous amine blends with carbon dioxide have been investigated first combining experiments and molecular simulations. The stopped-flow technology has been used to obtain the observed reaction rate constant of the overall reactions over the temperature range of 293 to 313 K and at different amine concentrations. A theoretical kinetic model, based on the first-principles quantum-mechanical simulations, has been put forward to interpret the reactions between CO2 and the aqueous trisolvent amine blends systems. The proposed model, based on the zwitterion mechanism and the base-catalyzed mechanism, shows good prediction with an acceptable absolute average deviation (AAD) of 6.32%, and has been found to be satisfactory in determining the kinetics of the involved complicated reactions.

引用

页数：11

共 44 条

[1] Kinetics of the reactive absorption of carbon dioxide in high CO2-loaded, concentrated aqueous monoethanolamine solutions [J].