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Lignin Valorization by Cobalt-Catalyzed Fractionation of Lignocellulose to Yield Monophenolic Compounds
Stockholm Univ, Dept Organ Chem, SE-10691 Stockholm, Sweden.
Stockholm Univ, Dept Organ Chem, SE-10691 Stockholm, Sweden.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.
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2019 (English)In: ChemSusChem, ISSN 1864-5631, E-ISSN 1864-564X, Vol. 12, no 2, p. 404-408Article in journal (Refereed) Published
Abstract [en]

Herein, a catalytic reductive fractionation of lignocellulose is presented using a heterogeneous cobalt catalyst and formic acid or formate as a hydrogen donor. The catalytic reductive fractionation of untreated birch wood yields monophenolic compounds in up to 34 wt % yield of total lignin, which corresponds to 76% of the theoretical maximum yield. Model compound studies revealed that the main role of the cobalt catalyst is to stabilize the reactive intermediates formed during the organosolv pulping by transfer hydrogenation and hydrogenolysis reactions. Additionally, the cobalt catalyst is responsible for depolymerization reactions of lignin fragments through transfer hydrogenolysis reactions, which target the beta-O-4' bond. The catalyst could be recycled three times with only negligible decrease in efficiency, showing the robustness of the system.

Place, publisher, year, edition, pages
2019. Vol. 12, no 2, p. 404-408
Keywords [en]
biomass fractionation, birch wood, cobalt, heterogeneous catalysis, lignin
National Category
Organic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-379235DOI: 10.1002/cssc.201802497ISI: 000459737500005PubMedID: 30485687OAI: oai:DiVA.org:uu-379235DiVA, id: diva2:1297174
Funder
Swedish Energy AgencyAvailable from: 2019-03-19 Created: 2019-03-19 Last updated: 2019-03-19Bibliographically approved

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Katea, Sarmad NaimWestin, Gunnar

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Katea, Sarmad NaimWestin, GunnarTungasmita, Duangamol N.Samec, Joseph S. M.
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Inorganic Chemistry
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