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1-butyl-3-methylimidazolium-tetrafluoroborate
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Solvatochromic parameters for binary mixtures of 1-(1-butyl)-3- methylimidazolium tetrafluoroborate with some protic molecular solvents
, Article Journal of Physical Chemistry B ; Volume 110, Issue 13 , 2006 , Pages 7073-7078 ; 15206106 (ISSN) ; Habibi-Yangjeh, A ; Gholami, M. R ; Sharif University of Technology
American Chemical Society
2006
Abstract
The solvatochromic parameters (ETN, normalized polarity parameter; π*, dipolarity/polarizability; β, hydrogen-bond acceptor basicity; α, hydrogen-bond donor acidity) were determined for binary solvent mixtures of 1-(1-butyl)-3-methylimidazolium tetrafluoroborate ([bmim]BF4) with water, methanol, and ethanol at 25°C over the whole range of mole fractions. In nonaqueous solutions, the ETN value of the mixture increases with mole the fraction of [bmim]BF4 and then decreases gradually to the value of pure [bmim]BF4. Positive deviation from ideal behavior was observed for the solvent parameters ETN, π*, and α, whereas the deviation of the β parameter is negative. The applicability of the combined...
Solubility of H2S in ionic liquids [bmim][PF6], [bmim][BF4], and [bmim][Tf2N]
, Article Journal of Chemical and Engineering Data ; Volume 54, Issue 6 , 2009 , Pages 1844-1849 ; 00219568 (ISSN) ; Rahmati Rostami, M ; Ghotbi, C ; Hosseini Jenab, M ; Ahmadi, A. N ; Sharif University of Technology
2009
Abstract
The solubility of hydrogen sulfide in three ionic liquids, 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]), 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]), and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([bmim][Tf 2N]), at temperatures ranging from (303.15 to 343.15) K and pressures up to 1 MPa was determined. The solubility data were correlated using the Krichevsky-Kasarnovsky equation, and Henry's law constants at different temperatures were obtained. From the solubility data, the partial molar thermodynamic functions of solution such as Gibbs energy, enthalpy, and entropy were calculated. Comparison showed that the solubility of H2S in these...
CFD modeling of CO2 absorption in membrane contactors using aqueous solutions of monoethanolamine-ionic liquids
, Article Industrial and Engineering Chemistry Research ; Volume 59, Issue 41 , 2020 , Pages 18629-18639 ; Darabi, M ; Ghaleh, V. R ; Bakhtiari, O ; Sharif University of Technology
American Chemical Society
2020
Abstract
The effects of addition of an ionic liquid to pure water as a physical absorbent and monoethanolamine (MEA) solutions as a chemical absorbent on carbon dioxide (CO2) absorption through hollow fiber membrane contactors were investigated using a 2D axisymmetric model. A numerical simulation was developed based on finite element method using computational fluid dynamics techniques. Liquid phase flowed in the tube side and gas mixture containing CO2 passed in the shell side of the membrane contactor in co-current and countercurrent modes. The simulation results are consistent with experimental data, and the root-mean-square error was calculated as 9 and 13% for pure water and 25 wt % for ionic...