Equations of state using an extended Twu-Coon mixing rule incorporating UNIFAC for high temperature and high pressure phase equilibrium predictions

The Soave, Twu and Boston–Mathias alpha functions in cubic equations of state

“…The values published by the authors [10,21] for the hydrocarbons and polar compounds considered in this work are reported in Table 2; the values of T c and ω listed in this table were taken from Reid. et al [22].…”

“…et al [22]. [21] (c) The generalized "Twu(ω)" equation proposed later by Twu et al [10] as a predictive version with respect to the acentric factor:…”

“…(3)) is considered for some representative hydrocarbons and polar compounds. The list of components considered is given in Table 2 together with the L, M and N parameters published by the authors [10,21]. For some compounds two sets of parameters were available, which allowed to check the influence of the parameter estimation on the behavior of the attractive terms.…”

“…According to the set of L, M and N values considered [10,21], the alpha curves may or not present inflexion points, as it is shown in Table 4 and is illustrated in Figs. 7a and c for hexane; it can also be noticed that, since the alpha function parameters are tuned on saturation pressures, they provide quite similar attractive alpha curves for subcritical conditions, while they usually diverge in the supercritical temperature range (Fig.…”

Modeling and energy optimization of the catalytic naphtha reforming process

“…Coon [96] su prezentovali studiju u kojoj su pokazali da se oktanski broj ne može precizno izračunati samo na bazi sastava molskih udela komponenata i njihovih pojedinačnih oktanskih brojeva, već je u jednačinu potrebno uvesti korekcioni član čije je koeficijente potrebno eksperimentalno odrediti.…”