It has been proven
that alcohols can regulate the performance of
aviation fuels. In this work, the densities (ρ) and viscosities
(η) for the ternary system of isopropylcyclohexane (1) + n-tridecane (2) + n-butanol (3) and the
corresponding binary systems have been measured to understand the
physical properties of endothermic hydrocarbon fuel with alcohol over
the whole composition range at temperatures from 293.15 to 333.15
K under atmospheric pressure (p = 0.1 MPa). The Redlich–Kister
equation has been used to fit the excess molar volumes (V
m
E) and viscosity
deviations (Δη) of binary systems, while four semiempirical
equations (Singh, Cibulka, Nagata–Tamura, and Redlich–Kister)
have been applied to correlate V
m
E and Δη of the ternary
system. For all binary systems, the values of V
m
E are positive.
The values of Δη for binary systems containing n-butanol are all negative. For the ternary system, the
values of V
m
E are all positive and the values of Δη
are all negative over the entire concentration range. All results
have been interpreted with the perspective of intermolecular interaction
and structural effect.
Biofuel may be an important component
of aviation fuel for its
significant advantages. In the present work, two biofuel samples,
methyl laurate and pinane, are selected for blending research with n-dodecane, a typical model fuel of aviation kerosene. Densities
and viscosities for the ternary system pinane (1) + n-dodecane (2) + methyl laurate (3) and corresponding binary systems
have been measured at the temperatures from 293.15 to 333.15 K and
atmospheric pressure. The excess molar volume (V
m
E) and viscosity
deviation (Δη) of binary systems have been calculated
based on experimental data and fitted to the Redlich–Kister
equation, while those of the ternary system have been fitted to Nagata–Tamura,
Redlich–Kister, Cibulka, and Singh semiempirical equations,
respectively. The values of the excess molar volume are all positive
for all investigated systems, while the viscosity deviations are all
negative. The results are discussed from the perspective of intermolecular
force and the structure. Furthermore, the densities and viscosities
of both binary and ternary mixtures are satisfactorily correlated
using the Jouyban–Acree model.
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