The equilibrium solubilities of azoxystrobin, flutriafol, and tebuconazole in subcritical 1,1,1,2-tetrafluoroethane (R134a) were measured using a static method. After tests to confirm the reliability of the experimental apparatus were carried out and the reliability was confirmed, measurements of the solubilities of the three fungicides were implemented at temperatures of 298.15, 313.15 and 333.15 K over the pressure range of 6.0-16.0 MPa. The results indicated that the solubilities increased with increasing pressure under isothermal conditions and increased with increasing temperature at a fixed pressure. To generalize the experimental results, five semi-empirical density-based models were employed to correlate the solubility data, including the Chrastil, Kumar and Johnston(K-J), Mendez-Santiago and Teja(M-S-T), Sung and Shim(S-S)and Adachi and Lu(A-L). The measured data showed reasonable agreement with the calculated results from models, for which the average absolute deviation (AARD) in the solubility correlation is from 0.0924 to 4.06%. Additionally, naphthalene has the effect of promoting dissolution as a co-solute in the process of determining the solubilities of fungicides by shorting the equilibrium time.
Compounds
#
Formula
Name
1
C2H2F4
1,1,1,2-tetrafluoroethane
2
CO2
carbon dioxide
3
C10H8
naphthalene
4
C22H17N3O5
azoxystrobin
5
C16H13F2N3O
flutriafol
6
C16H22ClN3O
tebuconazole
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.