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OxiOrganosolv: A novel acid free oxidative organosolv fractionation for lignocellulose fine sugar streams
Chemical Process and Energy Resources Institute (CPERI), CERTH, 6th Km Harilaou-Thermi Road, 57001 Thermi, Thessaloniki, Greece.
Chemical Process and Energy Resources Institute (CPERI), CERTH, 6th Km Harilaou-Thermi Road, 57001 Thermi, Thessaloniki, Greece. Industrial Biotechnology & Biocatalysis Group, Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou Campus, Athens 15780, Greece.
Chemical Process and Energy Resources Institute (CPERI), CERTH, 6th Km Harilaou-Thermi Road, 57001 Thermi, Thessaloniki, Greece.
Chemical Process and Energy Resources Institute (CPERI), CERTH, 6th Km Harilaou-Thermi Road, 57001 Thermi, Thessaloniki, Greece.
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2020 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 313, article id 123599Article in journal (Refereed) Published
Abstract [en]

The valorization of lignocellulosic biomass towards the production of value-added products requires an efficient pretreatment/fractionation step. In this work we present a novel, acid-free, mildly oxidative organosolv delignification process -OxiOrganosolv- which employs oxygen gas to depolymerize and remove lignin. The results demonstrate that the OxiOrganosolv process achieved lignin removal as high as 97% in a single stage, with a variety of solvents; it was also efficient in delignifying both beechwood (hardwood) and pine (softwood), a task in which organosolv pretreatments have failed in the past. Minimal amounts of sugar degradation products were detected, while cellulose recovery was ~100% in the solid pulp. Enzymatic hydrolysis of pulps showed >80 wt% cellulose conversion to glucose. Overall, the OxiOrganosolv pretreatment has significant advantages, including high delignification efficiency of hardwood and softwood biomass, absence of acid homogeneous catalysis and all corresponding challenges involved, and close to zero losses of sugars to degradation products.

Place, publisher, year, edition, pages
Elsevier, 2020. Vol. 313, article id 123599
Keywords [en]
Biorefinery, Delignification, Enzymatic hydrolysis, Organosolv oxidation pretreatment
National Category
Bioprocess Technology
Research subject
Biochemical Process Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-79562DOI: 10.1016/j.biortech.2020.123599ISI: 000551494900008PubMedID: 32540692Scopus ID: 2-s2.0-85086764284OAI: oai:DiVA.org:ltu-79562DiVA, id: diva2:1440855
Note

Validerad;2020;Nivå 2;2020-06-15 (alebob)

Available from: 2020-06-15 Created: 2020-06-15 Last updated: 2020-08-26Bibliographically approved

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Topakas, Evangelos

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