Solubilities of CO 2 in aqueous N-methyldiethanolamine and guanidinium trifluoromethanesulfonate ionic liquid systems at elevated pressures
In this work, the solubility of CO 2 in aqueous blended systems of N-methyldiethanolamine (MDEA) and guanidinium trifluoromethanesulfonate (gua +OTf -) have been carried out. The solubilities were measured at temperature 303.2K, 323.2K and 333.2K, over CO 2 partial pressure ranging from 500 to 3000k...
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| Main Authors: | , , , |
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| Format: | Article |
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Fluid Phase Equilibria
2011
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| Subjects: | |
| Online Access: | http://ac.els-cdn.com/S0378381210005224/1-s2.0-S0378381210005224-main.pdf?_tid=6235cb20-54b2-11e2-97e6-00000aab0f6c&acdnat=1357113770_db0c5cfb22dab7bc6644c1e98262aea0 http://ac.els-cdn.com/S0378381210005224/1-s2.0-S0378381210005224-main.pdf?_tid=6235cb20-54b2-11e2-97e6-00000aab0f6c&acdnat=1357113770_db0c5cfb22dab7bc6644c1e98262aea0 |
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| Summary: | In this work, the solubility of CO 2 in aqueous blended systems of N-methyldiethanolamine (MDEA) and guanidinium trifluoromethanesulfonate (gua +OTf -) have been carried out. The solubilities were measured at temperature 303.2K, 323.2K and 333.2K, over CO 2 partial pressure ranging from 500 to 3000kPa. All data were reported as loading capacity (molCO 2/total mol) as a function of partial pressure of CO 2 at the corresponding temperature. It has been found that the aqueous gua +OTf - ionic liquid gave significantly higher solubility, up to 1.63mol CO 2/total mol, as compared to other pure ionic liquids such as bmim +BF 4 -, emim +OTf - and emim +C 2N 3 - which recorded at 323.2K and 3000kPa. However, the addition of gua +OTf - ionic liquid to aqueous MDEA gave a slight decreased on solubility. Correlations of solubility as a function of partial pressure and temperature were obtained with deviation of ±0. |
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