Solubility and diffusion of CO sub(2) and H sub(2)S in the ionic liquid 1-ethyl-3-methylimidazolium ethylsulfate

The solubility and diffusion coefficient were determined for carbon dioxide and hydrogen sulfide gases in the ionic liquid 1-ethyl-3-methylimidazolium ethylsulfate ([emim][EtSO sub(4)]) at temperatures ranging from (303.15 to 353.15) K and pressures up to 1.6 MPa. The Krichevsky-Kasarnovsky equation...

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Bibliographic Details
Published in:The Journal of chemical thermodynamics 2010-10, Vol.42 (10), p.1298-1303
Main Authors: Jalili, Amir Hossein, Mehdizadeh, Ali, Shokouhi, Mohammad, Ahmadi, Amir Naser, Hosseini-Jenab, Masih, Fateminassab, Fakhrolsadat
Format: Article
Language:English
Subjects:
Carbon dioxide
Correlation
Diffusion coefficient
Entropy
Ionic liquids
Mathematical analysis
Solubility
Thermodynamics
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Summary:The solubility and diffusion coefficient were determined for carbon dioxide and hydrogen sulfide gases in the ionic liquid 1-ethyl-3-methylimidazolium ethylsulfate ([emim][EtSO sub(4)]) at temperatures ranging from (303.15 to 353.15) K and pressures up to 1.6 MPa. The Krichevsky-Kasarnovsky equation was used to correlate solubility data and Henry's law constants at different temperatures were obtained. The partial molar thermodynamic functions of solution such as Gibbs free energy, enthalpy, and entropy were calculated using the solubility data. A semi-infinite volume approach is used to obtain the diffusion coefficients for CO sub(2) and H sub(2)S and a correlation equation with temperature is presented for each gas. Comparison showed that H sub(2)S is more soluble than CO sub(2) and its diffusion coefficient is about two orders of magnitude as that of CO sub(2) in the ionic liquid studied in this work.
ISSN:0021-9614
DOI:10.1016/j.jct.2010.05.008