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

• Type: Article in International Scientific Journal
• Date: 2019

Authors

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

Journal

Title: Separation and Purification Technology

Vol. 217

Pages: 108-117

ISSN: 1383-5866

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 1 Citation

Scopus - 3 Citations

Scientific classification

FOS: Engineering and technology > Chemical engineering

CORDIS: Technological sciences > Engineering > Chemical engineering

Associated Projects

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

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10