Title:
Depolymerization of Lignin: Product Characterization and Evaluation of its Antioxidant Potential
Author(s):
Sánchez, J.L., Salafranca, J., Moles, S., Palomo, J.F., Martínez, C., Gil-Lalaguna, N., Dueso, C., Gonzalo, A.
Document(s):
Paper
Slide presentation
Abstract:
Soda black liquor produced from semichemical pulping of barley straw has been depolymerized at different temperatures (250 to 325 ºC), time (1 to 3 h) and initial solids content (7 to 14 %) and the liquid product has been added to biodiesel in order to test its antioxidant potential. The depolymerization products have been analyzed by gel permeation chromatography (GPC), gas chromatography-mass spectrometry (GC-MS) and Fourier-transform infrared spectroscopy (FTIR). Regarding the molecular weight distribution, temperature and time have been the most influential factors, especially temperature that decreases the observed molecular weight. By GC-MS the presence of volatile phenolic compounds has been determined. Temperature was again the most influential: the higher the temperature the lower concentration of phenolics. Regarding the FTIR, the measured spectra hardly change with the experimental conditions. Oxidation stability of biodiesel increases with the reaction temperature applied to black liquor, suggesting that the increase of oxidation stability is not caused by the volatile phenolic compounds.
Keywords:
biodiesel, lignin, oxidation, additives
Topic:
Biomass Conversion Technologies for Liquid and Gaseous Fuels, Chemicals and Materials
Subtopic:
Production and application of biobased chemicals
Event:
25th European Biomass Conference and Exhibition
Session:
3CO.11.2
Pages:
1005 - 1011
ISBN:
978-88-89407-17-2
Paper DOI:
10.5071/25thEUBCE2017-3CO.11.2
Price:
FREE
