✦ LIBER ✦

Equilibrium constants from a modified Redlich-Kwong equation of state

✍ Scribed by Giorgio Soave

Publisher: Elsevier Science
Year: 1972
Tongue: English
Weight: 444 KB
Volume: 27
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(72)80096-4

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✦ Synopsis

A modified Redlich-Kwong equation of state is proposed. Vapor pressures of pure compounds can be closely reproduced by assuming the parameter a in the original equation to be temperature-dependent. With the introduction of the acentric factor as a third parameter, a generalized correlation for the modified parameter can be derived. It applies to all nonpolar compounds.
With the application of the original generalized mixing rules, the proposed equation can be extended successfully to multicomponent-VLE calculations, for mixtures of nonpolar substances, with the exclusion of carbon dioxide. Less accurate results are obtained for hydrogen-containing mixtures

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