Title:
Molecular Mechanisms in Pyrolytic Formation of Monomers/Oligomers from Lignin
Author(s):
Kawamoto, H., Kotake, T., Saka, S.
Document(s):
Paper
Poster
Abstract:
Lignin is a major component (20-30 wt%) of lignocellulosic biomass. In this paper, formation mechanisms of monomeric and oligomeric products from the pyrolysis of lignin are focused. The model compound studies using various ether (C-O)- and condensed (C-C)-types of dimers have suggested that the ether linkages are cleaved, which contributes the lignin depolymerization, although the condensed types of linkages are relatively stable. Furthermore, dimer with the ß-aryl ether type of the linkage, which is the most abundant type (>50%) of the lingin linkages, has been reported to form coniferyl alcohol (CA) in substantial yields. Thus, CA is expected to be an espcially important primary product during the pyrolytic depolymerization of lingin polymer chains. CA, however, is also known not to be a major monomeric product from the pyrolysis of lignins. Under these circumstances, we studied the pyrolytic reactivities of CA in detail, and then, the formation behaviors of the monomeric and oligomeric products from the pyrolysis of Japanese cedar (Cryptmeria japonica, a softwood) lignin are discussed at the molecular level, focusing on the reactivity of CA as the pyrolysis intermediate.
Keywords:
fast pyrolysis, gasification, lignin, pyrolysis, tar, reactivity
Topic:
R&D on Biomass Conversion Technologies for Heating, Electricity and Chemicals
Subtopic:
Pyrolysis and other biomass liquefaction technologies
Event:
21st European Biomass Conference and Exhibition
Session:
2CV.4.14
Pages:
935 - 937
ISBN:
978-88-89407-53-0
Paper DOI:
10.5071/21stEUBCE2013-2CV.4.14
Price:
FREE
