In this paper, we report the absolute measurements of CO2 solubility in aqueous tetra-n-butylammonium bromide (TBAB) solution. The measurement range was 0.2 MPa less than P less than 4 MPa, 286.15 K less than T less than 298.15 K, with 0 (pure water) less than wTBAB less than 0.4, where P, T, and wTBAB denote the pressure, temperature, and mass fraction of TBAB in the aqueous feed solutions, respectively. These thermodynamic conditions are outside the hydrate formation region. We evaluated salting-in and -out effects based on the experimental data, and confirmed that the CO2 salting-out effect of TBAB clearly appeared at T = 292 K with wTBAB less than 0.32 and the salting-in effect may exist for P greater than 3 MPa and T greater than 292 K with wTBABP0.4 mass fraction of TBAB.
Compounds
#
Formula
Name
1
C16H36BrN
tetrabutylammonium bromide
2
H2O
water
3
CO2
carbon dioxide
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.