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Selected Publication:

Schrems, M; Liebner, F; Betz, M; Zeilinger, M; Bohmdorfer, S; Rosenau, T; Potthast, A.
(2012): Understanding the Impact of Supercritical Carbon Dioxide on the Delignification Mechanism During Organosolv Pulping: A Model Compound Study
J WOOD CHEM TECHNOL. 2012; 32(3): 225-237. FullText FullText_BOKU

Abstract:
The delignification pathways during Organosolv pulping with and without involvement of supercritical carbon dioxide (scCO(2)) were studied with lignin model substances. As expected, the degradation rate of all model compounds depended strongly on the temperature, and model compounds carrying a "free" phenolic hydroxyl group were found to be significantly more reactive than their methoxylated, non-phenolic counterparts. Supercritical carbon dioxide was found to enhance the delignification process by lowering the activation energy and accelerating the model substance decay; therefore its application in Organosolv concepts appears reasonable and further studies are proposed. While consumption of the model compounds was accelerated by scCO(2), the formation of stable end products was slowed down, which is explained by the stabilization of intermediates.
Authors BOKU Wien:
Betz Mireille
Böhmdorfer Stefan
Liebner Falk
Potthast Antje
Rosenau Thomas
Schrems Michael

Find related publications in this database (Keywords)
Organosolv
supercritical carbon dioxide
delignification
lignin model compounds
kinetics


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