An Equation Of State Description Of Weak Electrolyte VLE Behavior
The perturbed-hard-chain equation of state as applied to polar molecules by Gmehling et al. (1979) has been extended to describe the VLE behavior of weak electrolyte systems. Binary systems for which parameters have been determined include NH3/H2O, CO2/H2O, H2S/H2O and CO2/H2S. Parameters for the binary pairs CO2/NH3 and H2S/NH3 were determined from data for the ternary systems, H2O/CO2/NH3 and H2O/H2S/NH3. One additional parameter was required to describe each of these ternaries. Results for the quaternary system H2O/CO2/H2S/NH3 were then calculated. Results calculated with the EG (extended Gmehling) model and three other models: those of Edwards, Maurer, Newman, and Prausnitz, (1980), Beutier, Renon, (1978), and Wilson, (1978) are compared to literature data. The EG model gives deviations from the literature values that are equivalent, more or less, to those of the other models, even though the number of mixture parameters required by the EG model is much less than that required by the other models. © 1986.
K. J. Daumn et al., "An Equation Of State Description Of Weak Electrolyte VLE Behavior," Fluid Phase Equilibria, vol. 30, pp. 197 - 212, Elsevier, Jan 1986.
The definitive version is available at https://doi.org/10.1016/0378-3812(86)80054-1
Chemical and Biochemical Engineering
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01 Jan 1986