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Licensed Unlicensed Requires Authentication Published by De Gruyter June 1, 2005

Lignin Depolymerization in Hydrogen-Donor Solvents

  • Edwin Dorrestijn , Marieke Kranenburg , Didier Poinsot and Peter Mulder
From the journal Holzforschung

Summary

The conversion of different types of lignin to monophenolic compounds has been studied between 500 and 650 K, under typical coal liquefaction conditions using 9,10-dihydroanthracene (AnH2) and 7H-benz[de]anthracene (BzH) as the hydrogen-donor solvents. The yield of phenolic compounds was found to increase with the capacity of the hydrogen donor. The application of a polar cosolvent appeared to be beneficial as well. The differences in product distribution could be related to the origin of lignin. The maximum yield amounted to 11 % after 4 h at 625 K using milled wood lignin in AnH2. It has been found that lignin itself is a hydrogen-donating substance and capable of cleaving aromatic ketones such as α-phenoxyacetophenone.

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Published Online: 2005-06-01
Published in Print: 1999-11-11

Copyright © 1999 by Walter de Gruyter GmbH & Co. KG

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