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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/20332
Title: Liquefaction of lignocellulose: Do basic and acidic additives help out?
Authors: Kumar, Shushil
Lange J.-P.
Van Rossum G.
Kersten S.R.A.
Published in: Chemical Engineering Journal
Abstract: Lignocellulosic feedstock can be converted to bio-oil by direct liquefaction in a phenolic solvent such as guaiacol. The bio-oil could then be further upgraded to transportation fuel using conventional oil refining process. The production of heavy components (molecular weight >1000Da) was found to be a major hurdle in this process as it hinders the efficiency of recycling the bio-oil as liquefaction medium. This paper studies the effect of bases and acids on the liquefaction of biomass and their effectiveness in reducing the formation of heavy components. Acid was found to have a negative effect while all the bases showed a positive effect in reducing the formation of heavy components. Production of heavy components was found to depend on the pH of the medium; it decreases with increasing pH of the product measured after the reaction. Both acid and base additives got partly neutralized during the reaction and, therefore, do not operate as true catalysts. Further refill runs with KHCO3 were carried out to check the possibility to recycle the additive and the bio-oil as liquefaction medium. The additive appeared to perform poorly under recycle conditions. The base got neutralized and addition of fresh base catalyzed the degradation of the solvent (guaiacol) and the bio-oil upon oil recycling. This behavior may explain the recycling challenge faced in the PERC process. This study shows that single run experiments are insufficient to evaluate additives as they do not unravel acid/base deactivation and oil degradation. Refill runs are necessary for that. © 2014 Elsevier B.V.
Citation: Chemical Engineering Journal, 278: 99-104
URI: https://doi.org/10.1016/j.cej.2014.12.026
http://repository.iitr.ac.in/handle/123456789/20332
Issue Date: 2015
Publisher: Elsevier
Keywords: Base
Bio-oil
Biomass
Catalysis
Lignocellulose
Liquefaction
ISSN: 13858947
Author Scopus IDs: 55550211700
7402027792
16647548800
7004061067
Author Affiliations: Kumar, S., Sustainable Process Technology, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, Enschede, 7522 NB, Netherlands
Lange, J.-P., Sustainable Process Technology, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, Enschede, 7522 NB, Netherlands, Shell Global Solutions International B.V., Shell Technology Centre Amsterdam, Grasweg 31, Amsterdam, 1031 HW, Netherlands
Van Rossum, G., Sustainable Process Technology, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, Enschede, 7522 NB, Netherlands, Shell Global Solutions International B.V., Shell Technology Centre Amsterdam, Grasweg 31, Amsterdam, 1031 HW, Netherlands
Kersten, S.R.A., Sustainable Process Technology, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, Enschede, 7522 NB, Netherlands
Funding Details: The authors would like to thank Shell Global Solutions International B.V. for funding this research and Benno Knaken and Johan Agterhorst for the technical support. Shell Global Solutions International
Corresponding Author: Lange, J.-P.; Sustainable Process Technology, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, Netherlands
Appears in Collections:Journal Publications [CH]

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