Adsorption of vanillic and syringic acids onto a macroporous polymeric resin and recovery with ethanol:water (90:10 %V/V) solution

• Tipo: Artigo em Revista Científica Internacional
• Data: 2019

Autores

Maria Inês F. Mota (Autor) Outra; Sílvia Barbosa (Autor) Outra; Paula C. Rodrigues Pinto (Autor) FEUP; Ana Mafalda Ribeiro (Autor) FEUP; Alexandre Ferreira (Autor) FEUP; José Miguel Loureiro (Autor) FEUP; Alírio E. Rodrigues (Autor) FEUP

Revista

Título: Separation and Purification Technology

Vol. 217

Páginas: 108-117

ISSN: 1383-5866

Editora: Elsevier

Indexação

ISI Web of Knowledge - 1 Citação

Scopus - 3 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia química

Projetos Associados

LSRE-LCM - Laboratório de Processos de Separação e Reação - Laboratório de Catálise e Materiais

Outras Informações

ID Authenticus: P-00Q-G0N

DOI: 10.1016/j.seppur.2019.02.008

Abstract (EN): In this work the adsorption of vanillic (VA) and syringic (SA) acids onto the nonpolar resin SP700 was investigated aiming to collect data to evaluate their separation from a lignin oxidation mixture containing other phenolic compounds. The respective adsorption equilibrium isotherms in aqueous solutions were assessed at three different temperatures 288, 298 and 333 K and experimental results were fitted with Bi-Langmuir isotherm model. Maximum adsorption capacities of 0.486 g g(dry resin)(-1) and 0.407 g g(dry resin)(-1) were obtained for VA and SA, respectively. Dynamic studies at different temperatures and feed concentrations were performed and a mathematical model comprising the Bi-Langmuir equilibrium isotherm, axial dispersed plug flow, intraparticle mass transfer resistance expressed with linear driving force approximation with no temperature gradients and constant porosity along the bed successfully described the adsorption concentration histories at the outlet of the fixed bed. More than 83% of each phenolic acid was readily eluted within 5 min elution with ethanol:water (90:10 %V/V) solution allowing obtaining a final concentrated solution with 5.8-11.7 g L-1.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10