Title:
Production of High Purity Lignin from Rapeseed Meal Using a Microwave-Assisted Hydrothermal Process
Author(s):
Remón, J., Zhou, L., Fan, J., Macquarrie, D., Budarin, V., Clark, J.H.
Document(s):
Paper
Poster
Abstract:
The present work describes a quick and efficient method for the production of lignin from rapeseed meal using a microwave-assisted hydrothermal process. Specifically, the following operating conditions were used for the isolation of high purity lignin from this material: a temperature of 190 ºC, a reaction time of 10 minutes, a concentration of sulphuric acid of 0.2 mol/L and a biomass/water mass ratio (m/m) of 3/10. The isolated lignin was thoroughly characterised and a comparison was established between the original biomass and the lignin produced. The experimental results revealed that this microwave assisted hydrothermal process is a quick and efficient method for the production of high purity lignin (>90%) from rapeseed meal with an experimental yield (15.84.0.37%) very close to the theoretical lignin content of this biomass (19 wt.%). The comparison between the characterisation results for the original biomass and the isolated lignin showed an increase in the proportion of C together with a decrease in the relative amounts of O and N, the proportion of H being less affected. The STA analysis revealed a greater thermal stability of lignin than that of the original biomass, which is in agreement with the information obtained from the solid-state 13C NMR spectra that showed an increase in the proportion of aromatics due to the elimination of cellulose and hemicellulose. In addition, the FTIR spectra also displayed a decrease in the CO-H region for lignin. These developments are in agreement with the Py-GC/MS experiments where an increase in the proportions of phenols along with a decrease in the relative amount of hydrocarbons was noticed for the isolated lignin in comparison with the results obtained for the original material.
Keywords:
biomass, lignin, rapeseed, upgrading, bioproducts
Topic:
Biomass Conversion Technologies for Liquid and Gaseous Fuels, Chemicals and Materials
Subtopic:
Production of thermally treated solid biofuels
Event:
25th European Biomass Conference and Exhibition
Session:
3CV.2.13
Pages:
1412 - 1416
ISBN:
978-88-89407-17-2
Paper DOI:
10.5071/25thEUBCE2017-3CV.2.13
Price:
FREE
