New Expressions for the Vapor Pressure of Pure Components Constructed on Characteristic Points

A new procedure is proposed for the correlation and prediction of vapor pressures of pure fluids. Polynomial regression of experimental saturation data is constrained by anchoring the vapor pressure equation at two or more characteristic points which are to be satisfied exactly. Results for 12 test...

Full description

Saved in:
Bibliographic Details
Published in:Industrial & engineering chemistry research 1997-06, Vol.36 (6), p.2505-2508
Main Authors: Ledanois, Jean-Marie, Colina, Coray M, Santos, Jorge W, González-Mendizabal, Dosinda, Olivera-Fuentes, Claudio
Format: Article
Language:English
Subjects:
Chemical thermodynamics
Chemistry
Exact sciences and technology
General and physical chemistry
General. Theory
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A new procedure is proposed for the correlation and prediction of vapor pressures of pure fluids. Polynomial regression of experimental saturation data is constrained by anchoring the vapor pressure equation at two or more characteristic points which are to be satisfied exactly. Results for 12 test fluids show that the new expressions correlate experimental data from the triple to the critical point, with precision as good as or better than that given by more complex equations which use more adjustable coefficients. The method can also be used for extrapolation purposes, including prediction of triple or critical points and of hypothetical supercritical saturation states.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie9603629