Thermodynamic study of ATPS involving ethyl lactate and different inorganic salts

• Type: Article in International Scientific Journal
• Date: 2021

Authors

Maria Eugénia Macedo (Author) FEUP; Pedro Velho (Author) FEUP; Elena Gómez (Author) FEUP; Patricia Requejo (Author) Other

Journal

Title: Separation and Purification Technology

Vol. 275 No. 119155

ISSN: 1383-5866

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

ISI Web of Science

Scopus - 2 Citations

Scientific classification

FOS: Engineering and technology

CORDIS: Technological sciences

Associated Projects

LA LSRE-LCM - Financiamento Plurianual 2020-2023 para a Unidade LA LSRE-LCM Laboratório de Processos de Separação e Reacção - Laboratório de Catálise e Materiais

Other information

Authenticus ID: P-00V-4R8

DOI: 10.1016/j.seppur.2021.119155

Abstract (EN): In this work, three Aqueous Two-Phase Systems (ATPS) involving ethyl lactate and the inorganic salts (NH4)(2)SO4, K2HPO4 and NaH2PO4 have been studied. To analyse the separation process, binodal curves and tie lines were experimentally determined at T = 298.15 K and atmospheric pressure. The experimental binodal data were successfully fitted using several empirical equations: Merchuk et al., Hu et al., Han et al. and Jayapal et al., and the degree of consistency of the tie line compositions was evaluated using Othmer-Tobias and Brancoft equations. The liquid-liquid equilibria were fitted using the Pitzer-Debye-Hiickel + UNIQUAC and the UNIQUAC thermodynamic models. For all systems, the modelled tie lines were very similar to the experimental ones, but the first model presented somewhat smaller deviations, which allows to conclude that long-range forces present in these systems with strong salts should be considered.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8