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首页> 外文期刊>Fluid Phase Equilibria >Solubilities of CO_2 in aqueous N-methyldiethanolamine and guanidinium trifluoromethanesulfonate ionic liquid systems at elevated pressures
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Solubilities of CO_2 in aqueous N-methyldiethanolamine and guanidinium trifluoromethanesulfonate ionic liquid systems at elevated pressures

机译：高压下在N-甲基二乙醇胺水溶液和三氟甲烷磺酸胍盐离子液体系统中的CO_2溶解度

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摘要

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 (molCO2/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 ±0.957%.
机译：在这项工作中，已经进行了CO_2在N-甲基二乙醇胺（MDEA）和三氟甲磺酸胍（gua〜+ [OTf]-）的水性共混体系中的溶解度。在温度为303.2K，323.2K和333.2K的情况下，在500至3000kPa的CO_2分压下测量了溶解度。所有数据均报告为在相应温度下负载量（molCO2 /总摩尔）与CO_2分压的关系。已经发现与[bmim]〜+ [BF_4]〜等纯离子液体相比，[gua] ++ [OTf]-离子水溶液具有更高的溶解度，最高可达1.63mol CO_2 /总摩尔。 -，[emim]〜+ [OTf]-和[emim]〜+ [C_2N_3]〜-以323.2K和3000kPa记录。然而，向水性MDEA中加入[+] [OTf]-离子液体会使溶解度略有降低。得到的溶解度与分压和温度的关系为±0.957％。

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