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Examination of how variations in lignin properties from Kraft and organosolv extraction influence the physicochemical characteristics of hydrothermal carbon
Umeå University, Faculty of Science and Technology, Department of Chemistry. Discipline of Chemistry, University of Newcastle, Callaghan, NSW, Australia.
Biochemical Process Engineering, Division of Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, Luleå, Sweden.
Umeå University, Faculty of Science and Technology, Department of Chemistry.ORCID iD: 0000-0001-8819-2278
Biochemical Process Engineering, Division of Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, Luleå, Sweden.
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2021 (English)In: Journal of Analytical and Applied Pyrolysis, ISSN 0165-2370, E-ISSN 1873-250X, Vol. 155, article id 105095Article in journal (Refereed) Published
Abstract [en]

Seven different lignin samples, three from Kraft extraction and four from organosolv extraction, were subjected to hydrothermal treatment at 260℃ for four hours to assess the impact of lignin type on the physicochemical properties of the hydrothermal material. The 13C Solid state NMR, XPS, FTIR and SEM analysis revealed that the different sources of lignin and the extraction conditions created variations in the degree of syringyl and guaiacyl subunits, inter-unit bonding arrangements, morphology and surface composition. Hydrothermal carbonization appeared to “normalize” the differences between each of the lignin samples, via breaking β-O-4 or α-O-4 linkages, removal of methoxy and syringyl subunits, and creation of C–C and 4-O-5 linkages to polymerization into large 100−200 μm amorphous carbon particles. Overall, this study indicates that the source and extraction type have minimal influence on the physicochemical structure and morphology of the final hydrothermal product.

Place, publisher, year, edition, pages
Elsevier, 2021. Vol. 155, article id 105095
Keywords [en]
Biomass, FTIR, Hydrochar, Hydrothermal synthesis, Solid state NMR, XPS
National Category
Other Chemistry Topics Materials Chemistry
Identifiers
URN: urn:nbn:se:umu:diva-182006DOI: 10.1016/j.jaap.2021.105095ISI: 000640932100003Scopus ID: 2-s2.0-85102867930OAI: oai:DiVA.org:umu-182006DiVA, id: diva2:1542075
Available from: 2021-04-06 Created: 2021-04-06 Last updated: 2023-09-05Bibliographically approved

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Latham, Kenneth G.Figueira, JoãoJansson, Stina

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