New Group Contribution Method for Predicting the Critical Pressures of Fatty Acids and Triglycerides
International Journal of Computational and Theoretical Chemistry
Volume 3, Issue 6, November 2015, Pages: 45-49
Received: Oct. 9, 2015; Accepted: Oct. 21, 2015; Published: Oct. 30, 2015
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Authors
Charles Otobrise, Department of Chemistry, Delta State University, Abraka, Nigeria
Kenneth Osondu Monago, Department of Pure and Industrial Chemistry, University of Port - Harcourt, Choba, Port- Harcourt, Nigeria
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Abstract
A new and useful method for evaluating and predicting the critical pressures (Pc) of n-fatty acids and triglycerides was developed in this study. Logarithmic equations which required critical temperature (Tc) and normal boiling temperature (Tb) were proposed for the fatty acids and their corresponding triglycerides. The method predicted with good accuracy the critical pressures (Pc) of the n-fatty acids, even without the input of the compressibility factor (ΔZb). The deviations of predicted critical pressures from experimental values were between (0-7)%, except for Caproic and Caprylic acids; where the method under predicted the critical pressures with deviations of -6.64% and -11.31% respectively. Experimental Pc values for the triglycerides were not available in the open literature for comparison.
Keywords
Critical Pressures, n-Fatty Acids, Triglycerides, Enthalpies of Vapourisation, Trouton’s Rule, Clausius-Clapeyron Equation
To cite this article
Charles Otobrise, Kenneth Osondu Monago, New Group Contribution Method for Predicting the Critical Pressures of Fatty Acids and Triglycerides, International Journal of Computational and Theoretical Chemistry. Vol. 3, No. 6, 2015, pp. 45-49. doi: 10.11648/j.ijctc.20150306.11
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Copyright © 2015 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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