High-pressure phase behavior of 1-ethyl-3-methylimidazolium tetrafluoroborate and carbon dioxide system

Kang Qin; Kai Wang; Yang Li; Fanhe Kong; Tao Wang

doi:10.1039/c5ra03866a

High-pressure phase behavior of 1-ethyl-3-methylimidazolium tetrafluoroborate and carbon dioxide system

Kang Qin, Kai Wang^*, Yang Li, Fanhe Kong, Tao Wang

^*Corresponding author for this work

Tsinghua University

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The phase behavior of the 1-ethyl-3-methylimidazolium tetrafluoroborate ([emim][BF₄]) and carbon dioxide (CO₂) system from atmospheric to supercritical state was investigated at 0.1-15.0 MPa and 308.15-343.15 K. The solubility data of CO₂ in [emim][BF₄] and the volumetric expansion ratios of CO₂-saturated [emim][BF₄] were provided. Experimental results indicated that although CO₂ dissolved significantly in [emim][BF₄] (from 0 to 62 mol%), the ionic liquid phase only had an expansion ratio less than 17 vol%. The density difference between CO₂-saturated [emim][BF₄] and pure [emim][BF₄] was obvious at high pressure and low temperature, with a maximum of 16.11% at 308.15 K and 15.0 MPa. Based on the experimental results, a fitting equation applicable to precise data interpolation was proposed for the CO₂-saturated [emim][BF₄] density in this study.

Original language	English
Pages (from-to)	32416-32420
Number of pages	5
Journal	RSC Advances
Volume	5
Issue number	41
DOIs	https://doi.org/10.1039/c5ra03866a
Publication status	Published - 2015
Externally published	Yes

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title = "High-pressure phase behavior of 1-ethyl-3-methylimidazolium tetrafluoroborate and carbon dioxide system",

abstract = "The phase behavior of the 1-ethyl-3-methylimidazolium tetrafluoroborate ([emim][BF4]) and carbon dioxide (CO2) system from atmospheric to supercritical state was investigated at 0.1-15.0 MPa and 308.15-343.15 K. The solubility data of CO2 in [emim][BF4] and the volumetric expansion ratios of CO2-saturated [emim][BF4] were provided. Experimental results indicated that although CO2 dissolved significantly in [emim][BF4] (from 0 to 62 mol\%), the ionic liquid phase only had an expansion ratio less than 17 vol\%. The density difference between CO2-saturated [emim][BF4] and pure [emim][BF4] was obvious at high pressure and low temperature, with a maximum of 16.11\% at 308.15 K and 15.0 MPa. Based on the experimental results, a fitting equation applicable to precise data interpolation was proposed for the CO2-saturated [emim][BF4] density in this study.",

author = "Kang Qin and Kai Wang and Yang Li and Fanhe Kong and Tao Wang",

note = "Publisher Copyright: {\textcopyright} 2015 The Royal Society of Chemistry.",

year = "2015",

doi = "10.1039/c5ra03866a",

language = "English",

volume = "5",

pages = "32416--32420",

journal = "RSC Advances",

issn = "2046-2069",

publisher = "Royal Society of Chemistry",

number = "41",

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TY - JOUR

T1 - High-pressure phase behavior of 1-ethyl-3-methylimidazolium tetrafluoroborate and carbon dioxide system

AU - Qin, Kang

AU - Wang, Kai

AU - Li, Yang

AU - Kong, Fanhe

AU - Wang, Tao

PY - 2015

Y1 - 2015

N2 - The phase behavior of the 1-ethyl-3-methylimidazolium tetrafluoroborate ([emim][BF4]) and carbon dioxide (CO2) system from atmospheric to supercritical state was investigated at 0.1-15.0 MPa and 308.15-343.15 K. The solubility data of CO2 in [emim][BF4] and the volumetric expansion ratios of CO2-saturated [emim][BF4] were provided. Experimental results indicated that although CO2 dissolved significantly in [emim][BF4] (from 0 to 62 mol%), the ionic liquid phase only had an expansion ratio less than 17 vol%. The density difference between CO2-saturated [emim][BF4] and pure [emim][BF4] was obvious at high pressure and low temperature, with a maximum of 16.11% at 308.15 K and 15.0 MPa. Based on the experimental results, a fitting equation applicable to precise data interpolation was proposed for the CO2-saturated [emim][BF4] density in this study.

AB - The phase behavior of the 1-ethyl-3-methylimidazolium tetrafluoroborate ([emim][BF4]) and carbon dioxide (CO2) system from atmospheric to supercritical state was investigated at 0.1-15.0 MPa and 308.15-343.15 K. The solubility data of CO2 in [emim][BF4] and the volumetric expansion ratios of CO2-saturated [emim][BF4] were provided. Experimental results indicated that although CO2 dissolved significantly in [emim][BF4] (from 0 to 62 mol%), the ionic liquid phase only had an expansion ratio less than 17 vol%. The density difference between CO2-saturated [emim][BF4] and pure [emim][BF4] was obvious at high pressure and low temperature, with a maximum of 16.11% at 308.15 K and 15.0 MPa. Based on the experimental results, a fitting equation applicable to precise data interpolation was proposed for the CO2-saturated [emim][BF4] density in this study.

UR - https://www.scopus.com/pages/publications/84927640230

U2 - 10.1039/c5ra03866a

DO - 10.1039/c5ra03866a

M3 - Article

AN - SCOPUS:84927640230

SN - 2046-2069

VL - 5

SP - 32416

EP - 32420

JO - RSC Advances

JF - RSC Advances

IS - 41

ER -

High-pressure phase behavior of 1-ethyl-3-methylimidazolium tetrafluoroborate and carbon dioxide system

Abstract

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