Solubility of Hydrogen Sulfide in [bmim][PF6]

Abstract

New experimental data are presented for the solubility of hydrogen sulfide in the ionic liquid 1-N -butyl-3-methylimidazolium hexafluorophosphate ([bmim] [PF 6 ]) at five temperatures in the range (298-403) K at pressures up to 9.6 MPa. The ionic liquid [bmim] [PF 6 ] is a good solvent for hydrogen sulfide. At 9 MPa the mole fraction H 2 S in the liquid is about 0.7. The solubility is a strong function of temperature; at 2 MPa the solubility (mole fraction H 2 S) decreases from about 0.84 at 298 K to about 0.2 at 403 K. The Krichevsky-Kasarnovsky equation was used to correlate the experimental data, and Henry's constants were obtained. The solution thermodynamic properties at standard temperature and pressure were calculated.

Solubility and diffusion of CO2 and H2S in the ionic liquid 1-ethyl-3-methylimidazolium ethylsulfate

“…However, experimental data for the solubility and diffusion of hydrogen sulfide in ILs are scarce. Besides the data reported by Jou and Mather [19] for the solubility of H 2 S in 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim] [PF 6 ]) at temperatures from (298.15 to 403.15) K and pressures up to 9.6 MPa and those reported by Pomelli et al [20] for the solubility of H 2 S in different [bmim] + -based ILs with different anions and in a series of bis-(trifluoromethyl)sulfonylimide ([Tf 2 N] À ) ILs with different cations at T = 298.15 K and 1400 kPa, the remaining data have been produced in our laboratory at temperatures ranging from (303. 15 [24].…”

Solvation Thermodynamic Properties of Hydrogen Sulfide in [C4mim][PF6], [C4mim][BF4], and [C4mim][Cl] Ionic Liquids, Determined by Molecular Simulations

“…33 Nevertheless, the experimental information regarding the solubility of H 2 S in ionic liquids is still 3 scarce. 18,19 An excellent review of the solubility of gases in ionic liquids has been published by Lei et al 34 In the H 2 S-[C 4 mim][PF 6 ] system at 298. 15 indicating that the solvation process is unfavorable, difficult to occur.…”

“…Ghobadi et al 53 18,19,51,55,57 In contrast the amount of information available for CO 2 is large and continues to grow. 4,12,13,15,16,[23][24][25][26][27][28][29][30][31]33,38,49,50,52,[53][54][55][56][57]59 The solubility of gases in liquid solvents can be obtained by molecular simulation calculations by determining the Henry's constant (k H ).…”

Solubility of H2S in ionic liquids [hmim][PF6], [hmim][BF4], and [hmim][Tf2N]

“…However, experimental data for the solubility of hydrogen sulphide in ionic liquids is scarce. Jou and Mather [11] N] was provided by Merck with nominal mass fraction purity >0.99 and water content <100 Á 10 À6 , and hydrogen sulphide (c.p. grade 0.995 minimum mass fraction purity) was obtained from Roham gas company.…”