Valorization of alkaline lignin and optimization of vanillin production by heterogeneous Fenton-type catalysts

Fenton processes are a promising approach toward high-value chemical production from waste lignin. In this study, heterogeneous Fenton oxidation was employed to convert alkaline lignin into vanillin. The effects of Fe 0 , Fe 2+ , Fe 3+ , and H 2 O 2 concentrations, temperature (25–50 °C), and reacti...

Full description

Saved in:
Bibliographic Details
Published in:Biomass conversion and biorefinery 2021-06, Vol.11 (3), p.1029-1039
Main Authors: Manassa, Apisit, Seesuriyachan, Phisit
Format: Article
Language:English
Subjects:
Aromatic compounds
Biotechnology
Energy
Factorial design
Hydrogen peroxide
Lignin
Optimization
Original Article
Oxidation
Reaction time
Renewable and Green Energy
Response surface methodology
Vanillin
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Fenton processes are a promising approach toward high-value chemical production from waste lignin. In this study, heterogeneous Fenton oxidation was employed to convert alkaline lignin into vanillin. The effects of Fe 0 , Fe 2+ , Fe 3+ , and H 2 O 2 concentrations, temperature (25–50 °C), and reaction time (15–60 min) on vanillin production from lignin was investigated using response surface methodology under a three-level factorial design. The study reveals that the concentrations of Fe 0 , Fe 2+ , Fe 3+ , and H 2 O 2 had an important effect on vanillin yield, whereas reaction temperature and time had positive effects on the process of vanillin production. Based on the numerical optimization and desirability function, the optimum conditions were 38.05 mg/L Fe 0 , 49.45 mg/L Fe 2+ , 71.35 mg/L Fe 3+ , and 1884.4 ppm H 2 O 2 at 41.404 °C for 60 min at pH 3. Under these conditions, the vanillin yield obtained was 0.690%, which was increased by 2.59-fold from lignin. The experimental results agreed with the predicted values. We show that heterogeneous Fenton oxidation has the potential to convert lignin into high-value aromatic compounds when carried out under optimum conditions.
ISSN:2190-6815
2190-6823
DOI:10.1007/s13399-020-00902-y