Note to Bruin-Prausnitz One-Parameter and Palmer-Smith Two-Parameter Local Composition Equation

Abstract

weigh a line drawn through the data very heavily toward the higher end without any consideration of the behavior of the lower end. Examination of the data on Figure 1 shows that the experimental data available for positive (&h/h0) fall reasonably well within the ±20% limits on h. Perhaps Danziger's concern about zero and negative values of (Ah/h0) is exaggerated.Sadek's correlation (Figure 1) was developed in an attempt to establish the major operating parameters affecting heat transfer under transport and to provide some guidance, heretofore unavailable to engineers, for estimating transport line heat transfer rates. It is believed that a step was taken toward achieving that goal by developing the use of the parameter nd2D. Undoubtedly, as in any area of learning, further information will serve to establish the quantitative dependencies more accurately.Literature Cited

UNIQUAC Interaction Parameters with Closure for Imidazolium Based Ionic Liquid Systems Using Genetic Algorithm

“…A feasible set is such that the rank of the coefficient matrix of the eliminated parameters in the closure equations is equal to the number of independent closure equations. A general expression for the number of feasible sets of parameter elimination for a c component system with n number of closure equation is given as (Ahmad and Khanna, 2003;Hala, 1972):…”

“…The binary interaction parameters for UNIQUAC and NRTL models are dependent on each other following a linear relationship called closure equations (Ahmad and Khanna, 2003;Juliá et al, 2005;Sahoo et al, 2006). For a ternary triplet i-j-k the adjustable binary interaction parameters are related as (Hala, 1972):…”

“…The number of such relationships for a c component system is 0.5 × c(c -3) + 1 (Hala, 1972). In the present work, the closure equation concept has been utilized first on the 116 nonionic liquid based systems, and then it has been used on the ionic liquids along with the closure equations.…”

Identification of UNIQUAC binary interaction parameters in liquid-liquid equilibrium

“…2 for LLE of the ternary systems is redundant. In addition, a23 was set as a function of the remaining interaction parameters, according to the linear dependence among parameters already demonstrated elsewhere [3,48]. Therefore, only the values of 3 independent binary interaction parameters (a12, a21, a32) were obtained from the ternary experimental data of Methanol (1) + Benzene (2) + n-Heptane (3) system.…”