The solubilities of ammonia (NH3) in deep eutectic solvents (DESs) comprising of choline chloride (ChCl) and urea at the temperature ranging from (298.2 to 353.2) K and pressure ranging from (0 to 300.0) kPa were determined by a volumetric method. The molar ratios of ChCl to urea in selected DESs were 1:1.5, 1:2.0 and 1:2.5. It is found that the solubility of NH3 increases with the increase of pressure, but decreases with the increase of temperature. In addition, the solubilities of NH3 in ChCl + urea (1:2.0) are slightly higher than those in ChCl + urea (1:1.5) and ChCl + urea (1:2.5) at 313.2 K, while the difference in NH3 solubilities of ChCl + urea mixtures is negligible at 323.2-353.2 K. By fitting the experimental data with Henry's law equation, the Henry's law constants of NH3 in ChCl + urea mixtures were obtained. According to the relationship between Henry's law constant and temperature, the thermodynamic properties of NH3 absorption in ChCl + urea mixtures such as Gibbs free energy changes, enthalpy changes and entropy changes were also calculated.
Compounds
#
Formula
Name
1
H3N
ammonia
2
C5H14ClNO
choline chloride
3
CH4N2O
urea
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.