✦ LIBER ✦

Letter to the Editor

✍ Scribed by A. Marcilla; V. Gomis; A. Esteban

Publisher: American Institute of Chemical Engineers
Year: 1995
Tongue: English
Weight: 134 KB
Volume: 41
Category: Article
ISSN: 0001-1541
DOI: 10.1002/aic.690410437

No coin nor oath required. For personal study only.

✦ Synopsis

Several equations have been proposed for the relation between activity coefficient and mole fractions of the components in a multieomponent mixture. These equations use either the concept of local composition (Wilson, 1964; NRTL, Renon and Prausnitz, 1968; UNIQUAC, Abrams and Prausnitz, 1975) or the group contribution model (UNIFAC, Fredeslund et al., 1975; ASOG, Derr and Deal, 19691, and usually contain two adjustable parameters per each possible binary pair in the multicomponent solution.

In a multicomponent mixture, the "primary" interaction parameters a,, are characteristic constants of the interaction between one molecule of i component and that of j component; therefore, a set of three primary parameters (a,,, a r r , and a, ), is required to describe

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