Selection of Resins, Equilibrium and Sorption Kinetics of Lactobionic Acid, Fructose, Lactose and Sorbitol

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

I. Pedruzzi (Autor) Outra; E. A. Borges da Silva (Autor) FEUP; A. E. Rodrigues (Autor) FEUP

Revista

Título: Separation and Purification Technology

Vol. 63 Nº 3

Páginas: 600-611

ISSN: 1383-5866

Editora: Elsevier

Indexação

ISI Proceedings

ISI Web of Knowledge - 25 Citações

ISI Web of Science

Scopus - 22 Citações

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia química

Outras Informações

ID Authenticus: P-003-TYK

DOI: 10.1016/j.seppur.2008.07.001

Abstract (EN): The separation of quaternary mixtures of lactobionic acid, lactose, sorbitol and fructose using a gel-type ion-exchange resin loaded with H+, K+ and Ca2+ ions has been investigated. This separation is relevant in order to improve the productivity of lactobionic acid obtained from the enzymatic reaction catalyzed by Glucose-fructose oxidoreductase and glucono-delta-lactonase enzymes. Measurement of the single-component equilibrium isotherms for all four species was carried out in a preparative column packed with the selected resin at temperatures of 293, 313 and 333 K using the frontal analysis and column adsorption-desorption method. Mass transfer coefficients for all species at different temperatures have been estimated by solving the dynamic model of the chromatographic column. From pulse tests of single-component and mixture solutions, the K+ loaded resin was found to be suitable for this quaternary separation. The unfavourable adsorption isotherm for the lactobionic acid is described by the anti-Langmuir model. Other compounds have shown linear equilibrium in the concentration range up to 130 g L-1. Binary and quaternary fixed-bed experiments were well described by the dynamic model using the parameters obtained from the single-component adsorption data. (c) 2008 Elsevier B.V. All rights reserved.

Idioma: Inglês

Tipo (Avaliação Docente): Científica