Solubility enhancement of CO<sub>2</sub> in diethyl carbonate by ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide

XING Xiao; ZHAO Zhijun; TANG Zhigang; ZHANG Shaofeng; FEI Weiyang; LIANG Xiangfeng; LI Hongwei; GUO Dong

doi:10.11949/j.issn.0438-1157.20161033

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Solubility enhancement of CO₂ in diethyl carbonate by ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide

更新时间：2025-12-10

- Solubility enhancement of CO₂ in diethyl carbonate by ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide
- CIESC Journal Issue 2, Pages: 542-551(2017)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20161033
  CLC： Q028.1
- Online First：05 February 2017，
  
  Published：05 February 2017
- 稿件说明：
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XING Xiao, ZHAO Zhijun, TANG Zhigang, et al. Solubility enhancement of CO₂ in diethyl carbonate by ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide[J]. CIESC Journal, 2017, (2): 542-551. DOI: 10.11949/j.issn.0438-1157.20161033.
DOI：

XING Xiao, ZHAO Zhijun, TANG Zhigang, et al. Solubility enhancement of CO₂ in diethyl carbonate by ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide[J]. CIESC Journal, 2017, (2): 542-551. DOI: 10.11949/j.issn.0438-1157.20161033. DOI：

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。

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 of[Bmim] [NTf2] on DEC vapor pressure was studied using COSMO-RS model. The experimental results showed that CO2 solubility in DEC and[Bmim] [NTf2] increased with increasing pressure at constant temperature but decreased with increasing temperature at constant pressure. CO2 solubility in DEC was lower than that in[Bmim] [NTf2] under same conditions

which could be enhanced by adding[Bmim] [NTf2] to DEC. CO2 solubility in mixture of[Bmim] [NTf2] and DEC increased with increasing mass ratio of[Bmim] [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 of[Bmim] [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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Solubility enhancement of CO2 in diethyl carbonate by ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide

DOI：10.11949/j.issn.0438-1157.20161033

摘要

Abstract

关键词

Keywords

references

Solubility enhancement of CO₂ in diethyl carbonate by ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide