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Licensed Unlicensed Requires Authentication Published by De Gruyter July 6, 2016

Co-solvent system of [EMIM]Ac and DMF to improve the enzymatic saccharification of pussy willow (Salix gracilistyla Miq.)

  • Song Yi Han ORCID logo , Chan-Woo Park ORCID logo , Nam-Hun Kim ORCID logo and Seung-Hwan Lee ORCID logo EMAIL logo
From the journal Holzforschung

Abstract

A co-solvent system consisting of 1-ethyl-3-methylimidazolium acetate ([EMIM]Ac)/N,N-dimethyl formamide (DMF) with different mass ratios was tested to improve the enzymatic saccharification of pussy willow (Salix gracilistyla Miq.). This system effectively lowered the viscosity and increased the biomass loading in the system. The water-soluble fraction obtained from the pure [EMIM]Ac remained constant or increased slightly as the amount of DMF was increased to 70%. At [EMIM]Ac/DMF ratios of 5/5 and 3/7, longer pretreatment times and higher temperatures increased the water-soluble fraction. The crystallinity of the pretreated product was increased by increasing amounts of DMF. The yield of enzymatic saccharification by means of this co-solvent system was comparable to that based on a pure [EMIM]Ac pretreatment, even though the glucose yield was slightly lower in case of DMF amount >70%. Expectedly, longer pretreatment times and higher temperatures improved the yield of enzymatic saccharification.

Award Identifier / Grant number: NRF-2013R1A1A4A01005013

Funding statement: This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. NRF-2013R1A1A4A01005013).

Acknowledgments

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. NRF-2013R1A1A4A01005013).

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Received: 2016-2-22
Accepted: 2016-6-6
Published Online: 2016-7-6
Published in Print: 2017-1-1

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