Global phase equilibrium calculations: Critical lines, critical end points and liquid–liquid–vapour equilibrium in binary mixtures

High Pressure Phase Equilibrium Engineering

“…However, the liquid immiscibility can be overcome at higher temperatures, for instance at 373 K and pressures higher than 565 bar. (Cismondi and Michelsen 2007) close to the propane vapor pressure. These observations are in agreement with the model predictions.…”

Calculation of convergence pressure/temperature and stability test limit loci of mixtures with cubic equations of state

“…Negative flashes seem unavoidable for CL calculation, unless some appropriate modification of the procedure described by Cismondi and Michelsen [26] is set up. However, the latter seems extremely difficult.…”

“…A procedure similar to that proposed by Cismondi and Michelsen [26] for calculating critical loci of binary mixtures can be used to obtain initial estimates. Supposing the critical composition is already calculated, it can be updated using the equation:…”

Interval Arithmetic for Nonlinear Problem Solving

“…This is a highly nonlinear problem subject to analysis by different research groups for a number of years [4,7,14,17]. In this case, there is a mixture of methane and hydrogen sulfide where the problem is to determine all of the critical points for a given composition and domain ranges for temperature and molar volume using the Redlich-Kwong equation of state [28].…”

“…Lindvig et al [16] propose the EFV (Entropic-FV) model for predicting the miscibility behavior of paints. Cismondi and Michelsen [17] use a Newton procedure for the calculation of critical lines, critical endpoints, and three-phase lines for binary mixtures. Carstensen and Petković [18] propose the use of a hybrid method combining normal (Nourein's method) and interval arithmetic to arrive to the solution of polynomial equations efficiently.…”