| 离子液体[Bmim][NTf2]对CO2在碳酸二乙酯中溶解性能的强化 |
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| 引用本文： | 邢潇,赵志军,汤志刚,张少峰,费维扬,梁向峰,李红伟,郭栋.离子液体[Bmim][NTf2]对CO2在碳酸二乙酯中溶解性能的强化[J].化工学报,2017,68(2):542-551. |
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| 作者姓名： | 邢潇 赵志军 汤志刚 张少峰 费维扬 梁向峰 李红伟 郭栋 |
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| 作者单位： | 1. 河北工业大学化工学院, 天津 300130;
2. 化学工程联合国家重点实验室, 清华大学化学工程系, 北京 100084;
3. 中国科学院过程工程研究所绿色过程与工程重点实验室, 北京 100190 |
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| 基金项目： | 北京市自然科学基金项目（2164062）；中国科学院过程工程研究所绿色过程与工程重点实验室开放基金课题项目（LGPE-2014-01）；化学工程联合国家重点实验室开放课题项目（SKL-ChE-15A01）。 |
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| 摘 要： | 采用恒定容积法在温度范围308.15~328.15 K、压力范围0~3 MPa条件下测定了CO2在碳酸二乙酯（DEC）、离子液体Bmim]NTf2]以及二者不同质量分数配比混合溶剂中的溶解度，并用COSMO-RS模型研究了离子液体的加入对DEC蒸气分压的影响。实验表明，在相同实验条件下CO2在Bmim]NTf2]中的溶解度大于在DEC中的溶解度。Bmim]NTf2]的加入可强化CO2在DEC中的溶解性能，在相同温度下CO2在混合溶剂中的溶解度随Bmim]NTf2]质量分数增加而增大，在相同浓度的混合溶剂中CO2的溶解度随温度升高而降低。COSMO-RS模型计算表明，DEC的蒸气分压下降的分数随混合溶剂中离子液体质量分数增加而增大，而对于相同质量分数配比的混合溶剂温度对DEC的蒸气分压影响较小。
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| 关 键 词： | 离子液体 碳酸二乙酯 二氧化碳 物理吸收 模拟 |
| 收稿时间： | 2016-07-22 |
| 修稿时间： | 2016-08-24 |
Solubility enhancement of CO2 in diethyl carbonate by ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide |
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| XING Xiao,ZHAO Zhijun,TANG Zhigang,ZHANG Shaofeng,FEI Weiyang,LIANG Xiangfeng,LI Hongwei,GUO Dong.Solubility enhancement of CO2 in diethyl carbonate by ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide[J].Journal of Chemical Industry and Engineering(China),2017,68(2):542-551. |
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| Authors: | XING Xiao ZHAO Zhijun TANG Zhigang ZHANG Shaofeng FEI Weiyang LIANG Xiangfeng LI Hongwei GUO Dong |
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| Affiliation: | 1. School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, China;
2. State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
3. Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | CO2 solubility in diethyl carbonate (DEC), ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide (Bmim] NTf2]), and their mixtures at various mass ratio were measured isovolumetrically at temperature of 308.15-328.15 K and pressure of 0-3 MPa. Effect ofBmim] NTf2] on DEC vapor pressure was studied using COSMO-RS model. The experimental results showed that CO2 solubility in DEC andBmim] NTf2] increased with increasing pressure at constant temperature but decreased with increasing temperature at constant pressure. CO2 solubility in DEC was lower than that inBmim] NTf2] under same conditions, which could be enhanced by addingBmim] NTf2] to DEC. CO2 solubility in mixture ofBmim] NTf2] and DEC increased with increasing mass ratio ofBmim] NTf2] at constant temperature while CO2 solubility in mixtures of constant mass ratios decreased with increasing temperature. COSMO-RS simulation showed that percentage of DEC vapor pressure drop increased with increasing mass ratio ofBmim] NTf2] whereas DEC vapor pressure changed a little at temperature of 308.15-328.15 K for mixtures of same mass ratio. |
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| Keywords: | ionic liquids diethyl carbonate carbon dioxide physical absorption simulation |
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