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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Prediction of solid solute solubility in supercritical CO2 with cosolvents using the CPA EoS

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Author(s):
Bitencourt, Raphaela G. [1] ; Palma, Andre M. [2] ; Coutinho, Joao A. P. [2] ; Cabral, Fernando A. [1] ; Meirelles, Antonio J. A. [1]
Total Authors: 5
Affiliation:
[1] Univ Estadual Campinas, Sch Food Engn, Lab Extract Appl Thermodynam & Equilibrium, BR-13083862 Campinas, SP - Brazil
[2] Univ Aveiro, Chem Dept, CICECO, Campus Santiago, P-3810193 Aveiro - Portugal
Total Affiliations: 2
Document type: Journal article
Source: Fluid Phase Equilibria; v. 482, p. 1-10, MAR 1 2019.
Web of Science Citations: 0
Abstract

Supercritical carbon dioxide (scCO(2)) is widely used in separation processes applied to the food, chemistry, pharmaceutical and material industries. The knowledge of the solubility of solid solutes in scCO(2), with or without cosolvents, is essential for the design and optimization of extraction, fractionation and purification processes. This work evaluates the accuracy of Cubic Plus Association equation of state (CPA-EoS) to predict the solubility of solutes in ternary and/or quaternary systems from the binary interaction parameters. The solubility of 12 solid solutes in scCO(2) in presence of different organic cosolvents was investigated, totalizing 19 systems at pressures between 8 and 40 MPa, temperatures ranging from 308 K to 353 K and concentrations of cosolvent varying from 0.73 to 10 mol%. The overall average logarithmic deviation (ALD) between experimental and calculated data with CPA-EoS was 0.47, which is better than that obtained with PR + COSMOSAC previously reported in the literature. Furthermore, the effects of temperature, pressure and of cosolvent type and concentration on the solubility were well estimated with the CPA-EoS. (C) 2018 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 14/21252-0 - Equilibrium and production processes of biofuels and bioproducts
Grantee:Antonio José de Almeida Meirelles
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 10/16665-3 - Green coffee oil extraction by supercritical and pressurized fluid process, and comparison with the composition of coffee oil obtained by pressing for the small producers of the State of São Paulo - concentration analysis of bioactive diterpenes
Grantee:Alessandra Lopes de Oliveira
Support Opportunities: Regular Research Grants