A comparative kinetics study of CO2 absorption into aqueous DEEA/MEA and DMEA/MEA blended solutions

被引：90

作者：

Jiang, Wusan ^{[1
]}

Luo, Xiao ^{[1
]}

Gao, Hongxia ^{[1
]}

Liang, Zhiwu ^{[1
]}

Liu, Bin ^{[1
]}

Tontiwachwuthikul, Paitoon ^{[1
,2
]}

Hu, Xiayi ^{[3
]}

机构：

[1] Hunan Univ, Coll Chem & Chem Engn, Prov Hunan Key Lab Cost Effect Utilizat Fossil Fu, Joint Int Ctr Capture & Storage iCCS CO2, Changsha 410082, Hunan, Peoples R China

[2] Univ Regina, CETRI, Ind & Proc Syst Engn, Regina, SK S4S 0A2, Canada

[3] Xiangtan Univ, Coll Chem Engn, Xiangtan 411105, Hunan, Peoples R China

来源：

AICHE JOURNAL | 2018年 / 64卷 / 04期

基金：

中国国家自然科学基金;

关键词：

kinetics; carbon dioxide; blended amine; stopped-flow; model; CARBON-DIOXIDE ABSORPTION; MONOETHANOLAMINE SOLUTIONS; CAPTURE TECHNOLOGY; TEMPERATURE-RANGE; 298-313; K; AMINES; N; N-DIETHYLETHANOLAMINE; ALKANOLAMINES; MECHANISM; SOLVENTS;

D O I：

10.1002/aic.16024

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The kinetics of CO2 absorption into aqueous solutions of N,N-diethylethanolamine (DEEA), and N,N-dimethylethanolamine (DMEA), and their blends with monoethanolamine (MEA) have been studied in a stopped-flow apparatus. The kinetics experiments were carried out at the concentrations of DEEA and DMEA varying from 0.075 to 0.175 kmol/m(3), respectively, and that of MEA ranging between 0.0075 and 0.0175 kmol/m(3), over the temperature range of 293-313 K. Two kinetics models are proposed to interpret the reaction in the blended amine systems and the results show that the model which incorporates the base-catalyzed hydration mechanism and termolecular mechanism resulted in a better prediction. Furthermore, the kinetics behaviors of CO2 absorption into two blended systems are comprehensively discussed according to their molecular structures. It can be concluded that the interaction between tertiary amines and primary amines as well as the alkyl chain length of tertiary amines have a significant influence on the kinetics. (c) 2017 American Institute of Chemical Engineers AIChE J, 64: 1350-1358, 2018

引用

页码：1350 / 1358

页数：9

共 37 条

[1] Kinetics of the reaction of carbon dioxide with blends of amines in aqueous media using the stopped-flow technique [J].