Aqueous solubilities of two- to four-ring solid polycyclic aromatic hydrocarbons (PAHs) (naphthalene, anthracene, 1,2-benzanthracene, triphenylene, and p-terphenyl) were measured at temperatures within 313 K to the PAH melting point and pressures within the range (4 to 8) MPa by dynamic method combined with gas chromatography/mass spectrometry. A novel feature of the apparatus was the use of a capillary restrictor to minimize the system volume downstream of the sampling point. The results for naphthalene and anthracene compare favorably with the literature data whereas the solubilities of 1,2-benzanthracene, triphenylene, and p-terphenyl in pressurized hot water are reported for the first time. The solubilities (equilibrium mole fractions, x2) of PAHs are discussed in terms of temperature and hydrocarbon structure. Mean values of the relative change in the PAH solubility with temperature, ( ln x2/T), range from 5.4 * 10-2 K-1 in naphthalene to 7.2 * 10-2 K-1 in p-terphenyl. The ln x2 versus T plot for 1,2-benzanthracene is curved in the opposite direction as compared with the plots for anthracene, triphenylene, and p-terphenyl.
Compounds
#
Formula
Name
1
C10H8
naphthalene
2
C14H10
anthracene
3
C18H12
benz[a]anthracene
4
C18H12
triphenylene
5
C18H14
p-terphenyl
6
H2O
water
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.