ICCAS OpenIR
Study on the phase behaviors, viscosities, and thermodynamic properties of CO2/[C(4)mim][PF6]/methanol system at elevated pressures
Liu, ZM; Wu, WZ; Han, BX; Dong, ZX; Zhao, GY; Wang, JQ; Jiang, T; Yang, GY
2003-08-18
Source PublicationCHEMISTRY-A EUROPEAN JOURNAL
ISSN0947-6539
Volume9Issue:16Pages:3897-3903
AbstractAn apparatus to determine the vapor-liquid equilibria of CO2/ionic liquid (IL)/organic solvent multisystems and the viscosity of the liquid phase at elevated pressures has been constructed. The solubility of CO2 in 3-butyl-1-methyl-imidazolium hexafluorophosphate ([C(4)mim][PF6]) and the viscosity of CO2-saturated [C(4)mim][PF6] have been studied at 313.15, 323.15, and 333.15 K and at pressures up to 12.5 MPa. The phase behavior of CO2/[C(4)mim][PF6]/ methanol ternary mixture and the viscosity of the liquid phases at equilibrium condition have also been determined at 313.15 K and at 7.15 and 10.00 MPa. The partition coefficients of the components in the ternary system are calculated. Peng-Robinson equation of state and some thermodynamic functions are combined to calculate the fugacity coefficients of the components in the system. It demonstrates that the viscosity of the IL-rich phase decreases significantly with increasing pressure of CO2, and the effect of temperature on the Viscosity Of COAL mixture is not noticeable at high pressure, although the viscosity of the CO2-free IL decreases dramatically with increasing temperature. Compressed CO2 may become an attractive reagent for reducing the viscosity of ILs in many applications. The mole fraction of methanol in the CO2-rich phase is much lower than that in the IL-rich phase; this indicates that the interaction between the IL and methanol is stronger than that between CO2 and methanol. The fugacity coefficient of CO2 in IL-rich phase is larger than unity, while that of methanol is much small than unity, which further suggests that methanol-IL interaction is much stronger than CO2-IL interaction. However, the CO2-IL interaction is stronger than the CO2-methanol interaction.
KeywordCarbon Dioxide Ionic Liquids Solubility Supercritical Fluids Viscosity
DOI10.1002/chem.200204647
Indexed BySCI
Language英语
WOS IDWOS:000184925700020
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Cited Times:156[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/79812
Collection中国科学院化学研究所
Corresponding AuthorHan, BX
AffiliationChinese Acad Sci, Ctr Mol Sci, Inst Chem, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Liu, ZM,Wu, WZ,Han, BX,et al. Study on the phase behaviors, viscosities, and thermodynamic properties of CO2/[C(4)mim][PF6]/methanol system at elevated pressures[J]. CHEMISTRY-A EUROPEAN JOURNAL,2003,9(16):3897-3903.
APA Liu, ZM.,Wu, WZ.,Han, BX.,Dong, ZX.,Zhao, GY.,...&Yang, GY.(2003).Study on the phase behaviors, viscosities, and thermodynamic properties of CO2/[C(4)mim][PF6]/methanol system at elevated pressures.CHEMISTRY-A EUROPEAN JOURNAL,9(16),3897-3903.
MLA Liu, ZM,et al."Study on the phase behaviors, viscosities, and thermodynamic properties of CO2/[C(4)mim][PF6]/methanol system at elevated pressures".CHEMISTRY-A EUROPEAN JOURNAL 9.16(2003):3897-3903.
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