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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, Department of Chemistry, SE-901 87, Umeå, Sweden. Discipline of Chemistry, University of Newcastle, Callaghan, NSW, 2308, Australia.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0002-3687-6173
Umeå University, Department of Chemistry, Scilife Lab, SE-901 87, Umeå, Sweden.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0001-7500-2367
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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]
Hydrothermal synthesis, Biomass, Hydrochar, XPS, FTIR, Solid state NMR
National Category
Bioprocess Technology
Research subject
Biochemical Process Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-83406DOI: 10.1016/j.jaap.2021.105095ISI: 000640932100003Scopus ID: 2-s2.0-85102867930OAI: oai:DiVA.org:ltu-83406DiVA, id: diva2:1539981
Funder
Swedish Research Council Formas, 2016-20022Bio4Energy
Note

Validerad;2021;Nivå 2;2021-03-26 (alebob)

Available from: 2021-03-26 Created: 2021-03-26 Last updated: 2023-09-05Bibliographically approved

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Matsakas, LeonidasRova, UlrikaChristakopoulos, Paul

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