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Valorization of birch tops and branches containing mechanically inseparable wood and bark
Stockholm University, Faculty of Science, Department of Chemistry.
Stockholm University, Faculty of Science, Department of Chemistry.ORCID iD: 0000-0002-4158-7130
Stockholm University, Faculty of Science, Department of Environmental Science. Stockholm University, Faculty of Science, Department of Chemistry, Stockholm University Center for Circular and Sustainable Systems (SUCCeSS).ORCID iD: 0000-0001-9725-3351
Stockholm University, Faculty of Science, Department of Chemistry, Stockholm University Center for Circular and Sustainable Systems (SUCCeSS).ORCID iD: 0000-0001-8735-5397
Number of Authors: 42026 (English)In: Green Chemistry, ISSN 1463-9262, E-ISSN 1463-9270Article in journal (Refereed) Epub ahead of print
Abstract [en]

If valorization of tops and branches would be realized, there is potential to increase the overall yield from forestry by 50%, which would impact land use change and climate change considerably. Currently, these residues are either incinerated or left to decay in the forests. The main challenge of valorization of tops and branches is their composition: comprising both wood and bark that are mechanically inseparable. Herein, we propose a chemical approach to valorize all components of both wood and bark of tops and branches without prior mechanical separation. By applying a sequential fractionation sequence involving two different catalytic steps, all different parts of the tops and branches have been valorized into well-defined streams and an intact cellulose-rich pulp. It was found that the sequence of processes was important for the overall outcome. We hope that this first report of the valorization of tops and branches will inspire further studies to unlock the full potential of this challenging yet abundant feedstock.

Place, publisher, year, edition, pages
2026.
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:su:diva-257014DOI: 10.1039/d6gc01905fScopus ID: 2-s2.0-105040557806OAI: oai:DiVA.org:su-257014DiVA, id: diva2:2076735
Available from: 2026-06-22 Created: 2026-06-22 Last updated: 2026-06-22

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Ramazanova, LalaTammekivi, EliiseKruve, AnneliSamec, Joseph S. M.

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Department of ChemistryDepartment of Environmental ScienceStockholm University Center for Circular and Sustainable Systems (SUCCeSS)
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Materials Chemistry

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