3 research outputs found
High Pressure Densities and Derived Thermodynamic Properties of Pure (1<i>R</i>)‑(+)-α-Pinene, (1<i>S</i>)‑(−)-β-Pinene, and Linalool: Experiment and Modeling
No full textTerpenes usually found in plants have a wide range of
applications,
especially as additives in various types of fuels, and most recently
in the aviation industry, where they can be blended with jet fuels
or kerosene. In this work, the densities of pure terpenes (1R)-(+)-α-pinene, (1S)-(−)-β-pinene,
and linalool were measured over the temperature range T = (293.15 to 413.15) K and at high pressures p =
(0.1 to 60) MPa. The experimental density data were fitted by the
modified Tammann–Tait equation where the absolute average percentage
deviation between measured and calculated densities was less than
0.02%, the percentage maximum deviation was less than 0.2%, and the
average percentage deviation was less than 0.02% for all three measured
terpenes. The obtained parameters were used to determine isothermal
compressibility (κT), isobaric thermal expansivity
(αp), internal pressure (pint), and the difference between specific heat capacity at constant
pressure (cp) and constant volume (cv). Furthermore, the PC-SAFT model was applied
for liquid density prediction at high pressures. Derived thermodynamic
properties such as isothermal compressibility and isobaric thermal
expansivity increase as temperature increases and decrease with pressure
for all of the studied compounds
