Author, as appears in the article.: Aboagye, Dominic; Medina, Francesc; Contreras, Sandra
Department: Enginyeria Química
URV's Author/s: Aboagye, Dominic / Contreras Iglesias, Sandra / Medina Cabello, Francisco
Keywords: Photocatalysis Mechanocatalysis Lignin depolymerization High-value chemicals Fenton Catalytic depolymerization water-treatment tio2 photocatalysis oxidation mechanocatalysis high-value chemicals fenton degradation conversion cleavage aromatics acids
Abstract: Even though lignin is very rich in aromatic compounds, it remains the least exploited fraction of biomass due to its recalcitrant nature. Consequently, prevailing efforts to fully unlock its potential are still far from reaching due to the use of harsh conditions and energy-intensive processes which are not environmentally friendly. Herein, a facile approach for coupling acid-catalyzed mechanocatalysis (MC) via ball milling with TiO2 photocatalysis (PC)/Fenton for depolymerization of alkaline lignin was investigated. Mechanocatalysis (MC) involved prior acid impregnation (AI) followed by ball milling. A direct comparison of pretreatments (AI, BM, MC) coupled with oxidation processes was preliminarily undertaken. The untreated lignin (UL) served as the control. MC/PC showed the highest yield of major aromatic products. Vanillin, homovanillic acid, acetovanillone, guaiacol, and vanillic acid were major aromatic building blocks identified and quantified. Further optimization revealed a total monomer yield of 22.77 wt%. SEM and FTIR analysis were done with the latter revealing the existence of pre-oxidation reaction in the BM and MC lignin prior to PC. The proposed synergetic process could offer an advantage over prevailing robust systems used for lignin depolymerization.
Thematic Areas: Química Materiais Interdisciplinar Geociências General chemistry Engineering, chemical Engenharias iii Engenharias ii Engenharias i Ciências biológicas ii Ciências ambientais Ciências agrárias i Ciência de alimentos Chemistry, physical Chemistry, applied Chemistry (miscellaneous) Chemistry (all) Catalysis Biotecnología Biodiversidade Astronomia / física Arquitetura, urbanismo e design
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: dominic.aboagye@estudiants.urv.cat dominic.aboagye@estudiants.urv.cat sandra.contreras@urv.cat francesc.medina@urv.cat
Author identifier: 0000-0001-8917-4733 0000-0002-3111-1542
Record's date: 2024-10-12
Papper version: info:eu-repo/semantics/publishedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Catalysis Today. 413 113969-
APA: Aboagye, Dominic; Medina, Francesc; Contreras, Sandra (2023). Toward a facile depolymerization of alkaline lignin into high-value platform chemicals via the synergetic combination of mechanocatalysis with photocatalysis or Fenton process. Catalysis Today, 413(), 113969-. DOI: 10.1016/j.cattod.2022.11.030
Entity: Universitat Rovira i Virgili
Journal publication year: 2023
Publication Type: Journal Publications
Repositori URV