Experimental determination and theoretical correlation for the solubilities of dicarboxylic acid esters in supercritical carbon dioxide

Narayan, Ram C and Dev, Jacob Varun and Madras, Giridhar (2015) Experimental determination and theoretical correlation for the solubilities of dicarboxylic acid esters in supercritical carbon dioxide. In: JOURNAL OF SUPERCRITICAL FLUIDS, 101 . pp. 87-94.

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Abstract

The synthesis of high molecular weight esters such as bis (2-ethylhexyl) sebacate is of significance for its use as a lubricant. This ester is synthesized by the transesterification of dimethyl sebacate with 2-ethylhexanol. Therefore, the solubilities of bis (2-ethylhexyl) sebacate and dimethyl sebacate were determined at 308-328 K at pressures of 10-18 MPa in supercritical carbon dioxide. The solubility of dimethyl sebacate was always higher than bis (2-ethylhexyl) sebacate at a given temperature and pressure. The Mendez-Teja model was used to verify the self-consistency of data. Further, a new semi-empirical model with three parameters was developed using the solution theory coupled with Wilson activity coefficient. This model was used to correlate the experimental data of this work and solubilities of many high molecular weight esters reported in the literature. (C) 2015 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	JOURNAL OF SUPERCRITICAL FLUIDS
Publisher:	ELSEVIER SCIENCE BV
Additional Information:	Copy right for this article belongs to the ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Keywords:	Bis (2-ethylhexyl) sebacate; Dimethyl sebacate; Retrograde behavior; Solution model; Wilson activity coefficient model
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	15 Jun 2015 11:26
Last Modified:	15 Jun 2015 11:26
URI:	http://eprints.iisc.ac.in/id/eprint/51691

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