Paper details

Title:

Liquefaction of Lignin and Lignin-Rich Biomass by Catalytic Hydrogenolysis

Author(s):

Breunig, M., Gebhart, P., Hornung, U.

Document(s):

Abstract:

As part of an ongoing project this work is examining the liquefaction of varying feedstocks under conditions of well-known Bergius process of direct coal liquefaction by high pressure heterogeneous catalytic hydrogenolysis. Applying this process onto renewable resources like lignin and lignin-rich waste biomass it is possible to aim for aromatic components for chemical industry as well as for bio based liquid fuels or additives without competing with food or feed production. The performed experiments investigate the chemical conversion of different lignin types alongside samples of beech bark and fiber residues from pulp and paper industry using miscellaneous catalysts and catalyst preparations. By varying reaction conditions like catalyst concentration, temperature and concentration of sulfur the aim was to optimize the conditions of liquefaction for the chosen setup. It will be shown that lignin and lignin-rich biomass can be liquefied under conditions of direct coal liquefaction using molybdic acid and sulfidic iron catalysts. The liquid oil product can be obtained in good yields up to 80 wt.-% consisting of monocyclic aromatic compounds while removing the majority of hetero atomic functional groups. This can be achieved while receiving only a minimal amount of solid residue, reaction water and a valuable gas byproduct.

Keywords:

hydrogen, lignin, liquefaction, thermochemical conversion, catalysts

Topic:

Biomass Conversion Technologies for Liquid and Gaseous Fuels, Chemicals and Materials

Subtopic:

Pyrolysis and other biomass liquefaction technologies

Event:

24th European Biomass Conference and Exhibition

Session:

3CO.7.4

Pages:

1079 - 1084

ISBN:

978-88-89407-165

Paper DOI:

10.5071/24thEUBCE2016-3CO.7.4

Price:

FREE