Isobaric vapor–liquid equilibrium
is measured at 0.15 and
0.6 MPa for binary mixtures of butyl acetate with 2-propanol and 2-butanol.
The experimental data are reported and the thermodynamic consistency
is verified by using the point-to-point test. Prediction of these
binary systems was obtained by employing the analytical solutions
of groups (ASOG) and the different versions of UNIQUAC functional-group
activity coefficients (UNIFAC) group contribution models. The perturbed
chain-statistical associating fluid theory (PC-SAFT) equation of state
has been used to reproduce experimental data.
The isobaric vapor–liquid
equilibrium for the binary mixtures
of n-heptane + ethanol, n-heptane
+ 1-propanol, n-heptane + 2-propanol, and n-heptane + 1-butanol at 1.5 MPa was obtained experimentally
using a stainless steel ebulliometer. The experimental data have been
verified thermodynamically by employing the ϕ–ϕ
approximation. The azeotropic points in both mixtures have been verified
by considering the trend of the azeotropic data and using the bibliographic
data for each mixture. The Peng–Robinson–Stryjek–Vera
equation of state using both quadratic and Wong–Sandler mixing
rules as well as the Perturbed Chain–Statistical Associating
Fluid Theory was applied to evaluate the reproducibility of the data
by these models.
Experimental data of vapor–liquid equilibria (VLE) are reported for the following binary systems: butyl acetate+ethanol, butyl acetate+1–propanol and butyl acetate+1–butanol at 0.6 MPa. No azeotrope was found in the butyl acetate+1–butanol system at 0.6 MPa. The thermodynamic consistency of the obtained data was analyzed using some equations of state (EOS) in the point–to–point test. The phase behavior was satisfactorily modelled using the Peng–Robinson EOS. The new association parameter of the Hayden–O’Connell method was determined from 144 pure substances and the influence of the second virial coefficient calculations in the point–to–point test was evaluated.
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