A new equation of state (HSFT) based on fractal theory

Document Type

Article

Publication Date

12-1-2002

Abstract

This paper describes the molecular distribution of fluids by some fractal characteristics based on the current understandings of microstructures in fluids. The coordination relation was derived according to this fractal model. and the molecular mean potential function for simple square-well fluids was proposed. By applying this new mean potential function, a new equation of state (EOS) named HSFT was derived from statistical mechanics. Vapor pressures and saturated liquid densities of about 200 pure substances were correlated by the proposed model. Resulting equation parameters were further generalized by acentric factor ω and critical compressibility factor Zc. Saturated properties for 180 substances and enthalpies of vaporization for 115 substances, including compounds with strong polarity, were calculated by the generalized HSFT equation. Compared with several other equations of state, satisfactory results computed by HSFT equation imply that the generalized HSFT equation possesses better adaptability and reliability.

Identifier

0142259868 (Scopus)

Publication Title

Chemical Engineering Communications

External Full Text Location

https://doi.org/10.1080/00986440213880

ISSN

00986445

First Page

1155

Last Page

1195

Issue

9

Volume

189

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