2
0
2009
sor
dom
1
journal
Original
Soriano, A. N.[Allan N.]
Doma Jr., B. T.[Bonifacio T.]
Li, M. -H.[Meng-Hui]
J. Chem. Thermodyn.
2009
2020-09-29
Carbon dioxide solubility in 1-ethyl-3-methylimidazolium trifluoromethanesulfonate
In this work, we present new solubility results for carbon dioxide in the ionic liquid 1-ethyl-3-methylimidazolium trifluoromethanesulfonate for temperatures ranging from (303.2 to 343.2) K and pressures up to 5.9 MPa using a thermogravimetric microbalance. Carbon dioxide solubilities were determined from absorption saturation (equilibrium) results at each fixed temperature and pressure. The buoyancy effect was accounted for in the evaluation of the carbon dioxide solubility. A highly accurate equation of state and a group contribution predictive method for carbon dioxide and for ionic liquids, respectively, were employed to determine the effect of buoyancy on carbon dioxide solubility. The solubility measurements are presented as a function of temperature and pressure. An extended Henry s law equation was used to correlate the present experimental solubility values and the result was satisfactory.
Carbon dioxide
Absorption
Equilibrium solubility
1-Ethyl-3-methylimidazolium
trifluoromethanesulfonate
10.1016/j.jct.2008.11.001
4
41
525-529
1
InChI=1S/C6H11N2.CHF3O3S/c1-3-8-5-4-7(2)6-8;2-1(3,4)8(5,6)7/h4-6H,3H2,1-2H3;(H,5,6,7)/q+1;/p-1
ZPTRYWVRCNOTAS-UHFFFAOYSA-M
1-ethyl-3-methylimidazolium trifluoromethanesulfonate
1-ethyl-3-methyl-1H-imidazol-3-ium trifluoromethanesulfonate
1-ethyl-3-methylimidazolium triflate
C7H11F3N2O3S
1
Commercial source
1
98
2
Stated by supplier
2
De-gassed by boiling or ultrasonically
3
0.7
1
Karl Fischer titration
2
InChI=1S/CO2/c2-1-3
CURLTUGMZLYLDI-UHFFFAOYSA-N
carbon dioxide
CO2
1
Commercial source
1
99.9
3
Stated by supplier
1
2
1
1
1
Principal objective of the work
WZ
TRC
4/3/2009
1
Molality, mol/kg
thermogravimetric microbalance
Liquid
Direct value, X
1
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
Gas
1
Pressure, kPa
Liquid
2
Temperature, K
Liquid
1
180
2
2
303.2
4
1
0.1333
4
1
0.0011
1
205
3
2
313.2
4
1
0.0987
3
1
0.0008
1
230
2
2
323.2
4
1
0.083
3
1
0.0004
1
254
3
2
333.2
4
1
0.0819
3
1
0.0003
1
315
3
2
343.2
4
1
0.0918
3
1
0.0003
1
796
3
2
303.2
4
1
0.5906
4
1
0.0055
1
826
3
2
313.2
4
1
0.4013
4
1
0.004
1
865
3
2
323.2
4
1
0.3091
4
1
0.002
1
913
3
2
333.2
4
1
0.297
4
1
0.0015
1
957
3
2
343.2
4
1
0.2827
4
1
0.0013
1
1521
4
2
303.2
4
1
1.1054
5
1
0.0112
1
1533
4
2
313.2
4
1
0.7337
4
1
0.0063
1
1546
4
2
323.2
4
1
0.5629
4
1
0.0044
1
1571
4
2
333.2
4
1
0.5176
4
1
0.0039
1
1599
4
2
343.2
4
1
0.4816
4
1
0.0036
1
2764
4
2
303.2
4
1
1.9903
5
1
0.0198
1
2789
4
2
313.2
4
1
1.3455
5
1
0.0139
1
2813
4
2
323.2
4
1
1.0344
5
1
0.0087
1
2863
4
2
333.2
4
1
0.9657
4
1
0.0018
1
2888
4
2
343.2
4
1
0.8839
4
1
0.0022
1
4155
4
2
303.2
4
1
3.0589
5
1
0.0288
1
4215
4
2
313.2
4
1
2.0966
5
1
0.0211
1
4279
4
2
323.2
4
1
1.6339
5
1
0.0136
1
4339
4
2
333.2
4
1
1.4786
5
1
0.0111
1
4354
4
2
343.2
4
1
1.3816
5
1
0.0103
1
5447
4
2
303.2
4
1
3.9863
5
1
0.0364
1
5571
4
2
313.2
4
1
2.8243
5
1
0.0272
1
5671
4
2
323.2
4
1
2.2489
5
1
0.0183
1
5720
3
2
333.2
4
1
2.0011
5
1
0.015
1
5884
4
2
343.2
4
1
1.8838
5
1
0.014