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Novel pretreatment pathways for dissolution of lignocellulosic biomass based on ionic liquid and low temperature alkaline treatment
RISE, Innventia, PFI – Paper and Fiber Research Institute.ORCID iD: 0000-00003-2271-3637
RISE, Innventia, PFI – Paper and Fiber Research Institute.
2016 (English)In: Biomass and Bioenergy, ISSN 0961-9534, E-ISSN 1873-2909, Vol. 93, 194-200 p.Article in journal (Refereed) Published
Abstract [en]

Pretreatment, fractionation and hydrolysis remains costly and challenging process steps in biochemical conversion of softwoods. Here, ionic liquid pretreatment using 1-ethyl-3-methylimidazolium acetate (EMIM-OAc) at high temperature (100 °C, 6 h) and alkali based (NaOH/urea) pretreatment at sub-zero temperature (−18 °C, 24 h) were compared and combined in studies of Norway Spruce biomass deconstruction. Both treatments significantly improved the enzymatic digestibility of the biomass. EMIM-OAc gave higher glucan than mannan digestibility, indicating a more pronounced effect on the cellulose polymer than on the hemicellulose polymer. In contrast, low temperature alkali pretreatment using NaOH or NaOH + urea gave a more pronounced effect on mannan than on glucan digestibility. By combining the two methods the total monosugar yield after enzymatic hydrolysis was improved by 20–50% as compared to using ionic liquid or alkali based pretreatment alone. Lignin dissolution was low for both methods under the conditions studied.

Place, publisher, year, edition, pages
2016. Vol. 93, 194-200 p.
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:ri:diva-18921DOI: 10.1016/j.biombioe.2016.07.023Scopus ID: 2-s2.0-84989880908OAI: oai:DiVA.org:ri-18921DiVA: diva2:1040152
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Available from: 2016-10-26 Created: 2016-10-26 Last updated: 2016-10-26Bibliographically approved

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CiteExportLink to record
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