TY  - JOUR
N1  - cited By 3
TI  - Solubility of Methane in Alkylpyridinium-Based Ionic Liquids at Temperatures between 298.15 and 343.15 K and Pressures up to 4 MPa
IS  - 9
JF  - Journal of Chemical and Engineering Data
SN  - 00219568
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091440459&doi=10.1021%2facs.jced.0c00493&partnerID=40&md5=8918dd37628a1599ea2ace6d7ac3c5b0
EP  - 4648
N2  - Ionic liquids (ILs) are promising solvents for gas absorption and separation processes. In this work, the solubility of methane in four alkylpyridinium-based ILs, namely, 1-butylpyridinium bis(trifluoromethylsulfonyl)imide (C4pyTf2N), 1-hexylpyridinium bis(trifluoromethylsulfonyl)imide (C6pyTf2N), 1-butylpyridinium tetrafluoroborate (C4pyBF4), and 1-hexylpyridinium tetrafluoroborate (C6pyBF4), was measured at temperatures 298.15 to 343.15 K and pressures up to 4 MPa using a pressure drop method. The result showed that the solubility of methane increases with increasing pressure and decreasing temperature. In addition, the solubility of methane in ILs can be ranked as follows: C4pyBF4 < C6pyBF4 < C4pyTf2N < C6pyTf2N. Furthermore, Henry's law constant (KH) and thermodynamic properties, namely, enthalpy and entropy at an infinite dilution, were estimated from the experimental solubility data. The estimated thermodynamic properties revealed that the solubility of methane in alkylpyridinium-based ILs is not only governed by a favorable solute-solvent interaction but also balanced by an unfavorable entropy of solution. Copyright © 2020 American Chemical Society.
ID  - scholars12754
AV  - none
Y1  - 2020///
KW  - Entropy; Gas absorption; Ionic liquids; Methane; Solubility
KW  -  Experimental solubility datum; Henry's Law constant; Infinite dilution; Ionic liquid (ils); Separation process; Solute-solvent interaction; Tetrafluoroborates
KW  -  Temperature
A1  - Kurnia, K.A.
A1  - Matheswaran, P.
A1  - How, C.J.
A1  - Noh, M.H.
A1  - Kusumawati, Y.
SP  - 4642
PB  - American Chemical Society
VL  - 65
ER  -