Species distribution of CO2 absorption/desorption in aqueous and non-aqueous N-ethylmonoethanolamine solutions

被引：45
作者：
Chen, Siming [1 ]
Chen, Shaoyun [1 ]
Zhang, Yongchun [1 ]
Qin, Liang [1 ]
Guo, Chao [2 ]
Chen, Jian [1 ]
机构：
[1] Dalian Univ Technol, Dept Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China
[2] China Tianchen Engn Corp, Proc Mixture, Tianjin 300400, Peoples R China
来源：
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL | 2016年 / 47卷
关键词：
CO2; N-ethylmonoethanolamine (EMEA); Non-aqueous; Absorption-desorption; C-13; NMR; CARBON-DIOXIDE; C-13; NMR; ABSORPTION; CAPTURE; KINETICS; AMINES; DIETHANOLAMINE; ALKANOLAMINES; EQUILIBRIUM; PERFORMANCE;
D O I：
10.1016/j.ijggc.2016.01.046
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The CO2 absorption and desorption in N-ethylmonoethanolamine (EMEA) solutions were carried out using an absorption desorption apparatus and the species distribution was explored using the quantitative C-13 NMR spectroscopy. EMEA + ethanol solution had a much lower CO2 loading (0.547 mol CO2/mol EMEA) than EMEA + H2O solution (0.799 mol CO2/mol EMEA) due to the lower concentration of alky carbonate generated in EMEA + ethanol solution than the corresponding bicarbonate/carbonate as generated in EMEA + H2O solution and the no further reaction of carbamate with CO2 in EMEA+ ethanol solution. The EMEA regeneration efficiency of the EMEA+ ethanol solution at 363, 373 and 383K (55.44, 86.86 and 100.00%) was much higher than EMEA + H2O solution at corresponding temperatures (27.56, 30.25 and 38.80%), which was mainly influenced by the decomposition of carbamate, while the existence of bicarbonate prevented carbamate decomposing. (C) 2016 Elsevier Ltd. All rights reserved.
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收藏
页码：151 / 158
页数：8
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