1 research outputs found
Theoretically and Experimentally Exploring the Isobaric Vapor–Liquid Associating Behavior for Binary and Ternary Mixtures Containing Methanol, Water, and Ethanoic Acid
It is a formidable dilemma for vapor–liquid equilibrium
(VLE) association behavior in chemical separation procedures to correlate
and predict binary and ternary mixtures containing associated components,
since the form of components is completely unknown, such as monomers,
homogeneous or heterogeneous dimers, trimers, and even polymers, and
so on. Herein, the VLE data for the binary and ternary mixtures, including
methanol, water, and ethanoic acid, were measured via the various
liquid- and vapor-phase compositions using a Fisher ebulliometer at
101.33 kPa. The geometric configurations and distributions of diverse
clusters in methanol, water, and ethanoic acid systems were wholly
optimized at the B3LYP/6-31+G(d) level of theory using Gaussian 09.
Then, we established a strategy for computing the liquid activity
coefficients by pondering the various association species in the associating
system. The approach is named the discrete clusters (DC) model, and
the comparison is also provided between the calculating results for
the binary systems of the DC model and the UNIQUAC, NRTL, and Wilson
models. Moreover, the ternary system’s phase behavior was investigated
by using the DC, UNIQUAC, NRTL, and Wilson models without further
adjusting model parameters. The DC model conveyed the number of various
clusters, indicating better consistency and a smaller deviation from
the measured data. These VLE data originating from the DC model can
be applied to the design and simulation of the chemical separation
process of the binary and ternary association systems