RESEARCH ARTICLE
Thermodynamic Modeling of High-pressure Equilibrium Data for the Systems L-lactic Acid + (Propane + Ethanol) and L-lactic Acid + (Carbon Dioxide + Ethanol)
Isabel C. N. Debiena, Aline A. Rigob, Marcos L. Corazzac, Marcio A. Mazuttid, J. Vladimir OliveiraeM. Angela A. Meirelesa, *a*
Article Information
Identifiers and Pagination:
Year: 2015Volume: 9
First Page: 1
Last Page: 6
Publisher ID: TOCENGJ-9-1
DOI: 10.2174/1874123101509010001
Article History:
Received Date: 05/09/2014Revision Received Date: 22/12/2014
Acceptance Date: 08/01/2015
Electronic publication date: 26/2/2015
Collection year: 2015
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Abstract
This short communication reports the thermodynamic modeling of high-pressure equilibrium data (cloud points) for the systems L-lactic acid + (propane + ethanol) and L-lactic acid + (carbon dioxide + ethanol) from 323.15 K to 353.15 K and at pressures up to 25 MPa.The experimental data were modeled using the Peng-Robinson equation of state with the classical van der Waals quadratic mixing rule (PR-vdW2) and with the Wong-Sandler mixing rule (PR-WS). It is shown that the PR-vdW2 and PR-WS models were both able to satisfactorily represent the phase behavior of the system L-lactic acid + (carbon dioxide + ethanol). However, for the system L-lactic acid + (propane + ethanol), the PR-vdW2 model was not able to appropriately describe its phase behavior.