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Efficiency of acetic acid and formic acid as a catalyst in catalytical and mechanocatalytical pretreatment of barley straw

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Schneider, L., Dong, Y., Haverinen, J., Jaakkola, M., & Lassi, U. (2016). Efficiency of acetic acid and formic acid as a catalyst in catalytical and mechanocatalytical pretreatment of barley straw. Biomass and Bioenergy, 91, 134-142. https://doi.org/10.1016/j.biombioe.2016.05.015
Published in
Biomass and Bioenergy
Authors
Schneider, Laura |
Dong, Yue |
Haverinen, Jasmiina |
Jaakkola, Mari |
Lassi, Ulla
Date
2016
Discipline
Soveltavan kemian yksikköThe Unit of Applied Chemistry
Copyright
© 2016 Elsevier Ltd. This is a final draft version of an article whose final and definitive form has been published by Elsevier. Published in this repository with the kind permission of the publisher.

 
In this study, the potential of organic acids (formic acid, acetic acid) in a catalytical and mechanocatalytic conversion of lignocellulosic barley straw to valuable sugars is explored using sulfuric acid as a reference. Acid-catalyzed hydrolysis has been carried out with acid-impregnated samples as well as unmodified barley straw. In the mechanocatalytical approach, pretreatment consists of impregnation with the acid catalyst and mechanical treatment by ball milling following chemical hydrolysis. Straw samples and residues were analyzed by Fourier transform infrared spectrometry (FT-IR) whereas hydrolysate analysis was based on total reducing sugar (TRS) determination following the DNS method and capillary electrophoresis (CE) analysis. The results indicated that acetic acid and formic acid are rather mild acids yielding low TRS levels compared to the reference acid. Mechanocatalytical pretreatment slightly increased TRS yields, but not significantly. Strikingly, sulfuric acid showed an efficient conversion efficiency yielding almost 45% of TRS. Furthermore, this study provided evidence for the acetylation of straw components when acetic acid was used as catalyst. Alkali hydrolysis induced the de-esterification, but revealed no significant increase of TRS yields. ...
Publisher
Pergamon
ISSN Search the Publication Forum
0961-9534
Keywords
Barley straw mechanocatalytical conversion lignoselluloosa muurahaishappo etikkahappo
DOI
https://doi.org/10.1016/j.biombioe.2016.05.015
URI

http://urn.fi/URN:NBN:fi:jyu-201705292539

Publication in research information system

https://converis.jyu.fi/converis/portal/detail/Publication/25718491

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