Lignin extraction from acacia wood: Crafting deep eutectic solvents with a systematic D-optimal mixture-process experimental design
Artikel i vetenskaplig tidskrift, 2024

Lignin is a complex biopolymer whose efficient extraction from biomass is crucial for various applications. Deep eutectic solvents (DES), particularly natural-origin DES (NADES), have emerged as promising systems for lignin fractionation and separation from other biomass components. While ternary DES offer enhanced fractionation performance, the role of each component in these mixtures remains unclear. In this study, the effects of adding tartaric acid (Tart) or citric acid (Cit) to a common binary DES mixture composed of lactic acid (Lact) and choline chloride (ChCl) were investigated for lignin extraction from acacia wood. Ternary Cit-based DES showed superior performance compared to Tart-based DES. Using a combined mixture-process D-Optimal experimental design, the Lact:Cit:ChCl DES composition and extraction temperature were optimized targeting maximum lignin yield and purity. The optimal conditions (i.e., Lact:Cit:ChCl, 0.6:0.3:0.1 molar ratio, 140 °C) resulted in a lignin extraction yield of 99.63 ± 1.24 % and a lignin purity of 91.45 ± 1.03 %. Furthermore, this DES exhibited feasible recyclability and reusability without sacrificing efficiency.

Design of experiments

Biomass fractionation

Lignin extraction

Ternary deep eutectic solvents

Lignin purity

DES recovery and reuse

Författare

Catarina Fernandes

Faculdade de Ciências e Tecnologia

Universidade de Coimbra

María José Aliaño-González

Universidad de Cadiz

Faculdade de Ciências e Tecnologia

Leandro Cid Gomes

Chalmers, Kemi och kemiteknik, Kemiteknik

Diana Bernin

Chalmers, Kemi och kemiteknik, Kemiteknik

Rita Gaspar

KU Leuven

Pedro Fardim

KU Leuven

Marco S. Reis

Universidade de Coimbra

Luís Alves

Universidade de Coimbra

B. Medronho

Faculdade de Ciências e Tecnologia

Mittuniversitetet

Maria Graça Rasteiro

Universidade de Coimbra

Carla Varela

Universidade de Coimbra

International Journal of Biological Macromolecules

0141-8130 (ISSN) 18790003 (eISSN)

Vol. 280 135936

Ämneskategorier (SSIF 2011)

Annan maskinteknik

DOI

10.1016/j.ijbiomac.2024.135936

PubMed

39322130

Mer information

Senast uppdaterat

2025-04-07