CO2 solubility and species distribution in aqueous solutions of 2-(isopropylamino)ethanol and its structural isomers
CO2 solubility and species distribution in aqueous solutions of 2-(isopropylamino)ethanol and its structural isomers
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DOI：
10.1016/j.ijggc.2013.03.027
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发表时间：
2013-09-01
影响因子：
3.9
通讯作者：
Higashii, Takayuki
中科院分区：
文献类型：
--
作者：
Yamada, Hidetaka;Chowdhury, Firoz A.;Higashii, Takayuki
在313 K、373 K和393 K，CO2分压为5 kPa ~ 0.2 MPa的条件下，测定了CO2在2-（异丙基氨基）乙醇（IPAE）和2-（丙基氨基）乙醇（PAE）水溶液中的溶解度。随着不同的CO2负荷，形态分析进行了准确的定量C-13核磁共振光谱，使用反门控去耦。IPAE比PAE具有更大的CO2容量，因为主要形成碳酸氢盐而不是氨基甲酸盐。然而，在IPAE溶液中的低CO2负载下也观察到显著量的氨基甲酸酯。将这些仲胺溶液的结果与伯胺单乙醇胺和5-氨基戊醇的结果进行比较。(C)2013爱思唯尔有限公司保留所有权利。
The solubility of CO2 was measured in aqueous solutions of 2-(isopropylamino)ethanol (IPAE) and 2-(propylamino)ethanol (PAE) at 313 K, 373 K and 393 K and CO2 partial pressures ranging from 5 kPa to 0.2 MPa. With different CO2 loadings, speciation analyses were conducted by accurate quantitative C-13 nuclear magnetic resonance spectroscopy using inverse-gated decoupling. IPAE had a larger capacity for CO2 than PAE because of the dominant formation of bicarbonate rather than carbamate. However, a significant amount of carbamate was also observed with low CO2 loadings in the IPAE solutions. The results for these secondary amine solutions were compared with those of the primary amines monoethanolamine and 5-aminopentanol. (C) 2013 Elsevier Ltd. All rights reserved.