Depolymerization of Laccase-Oxidized Lignin in Aqueous Alkaline Solution at 37 °C
| Autor: | Leilei Zhu, Christoph Gertler, Christoph Räuber, Anne-Maria Wallraf, Nico Anders, Ulrich Schwaneberg, Bernd Werner, Haifeng Liu, Jürgen Klankermayer, Philipp M. Grande, Walter Leitner |
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| Rok vydání: | 2019 |
| Předmět: |
Laccase
Aqueous solution Renewable Energy Sustainability and the Environment Depolymerization General Chemical Engineering Syringol 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Gel permeation chromatography chemistry.chemical_compound chemistry Vanillic acid Environmental Chemistry Lignin Organic chemistry Guaiacol 0210 nano-technology |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 7:11150-11156 |
| ISSN: | 2168-0485 |
| DOI: | 10.1021/acssuschemeng.9b00204 |
| Popis: | Lignin depolymerization is a coveted process for the generation of high-value compounds from a low-cost feedstock. This report describes a chemoenzymatic approach for the depolymerization of lignin involving a laccase-catalyzed oxidation under ambient air at room temperature followed by a base (NaOH)-induced depolymerization in aqueous solution at 37 °C. Two-dimensional nuclear magnetic resonance heteronuclear single quantum coherence spectroscopy, gel permeation chromatography, and liquid chromatography-electrospray ionization-quadrupole-time of flight-mass spectrometry (LC-ESI-Q-TOF-MS) analysis indicated the degradation of lignin and the formation of water-soluble fractions containing guaiacol, syringol, vanillic acid, m-anisic acid, and veratric acid. Furthermore, guaiacol and veratric acid are the main final products in the chemoenzymatic decomposition of a β-O-4 model compound. |
| Databáze: | OpenAIRE |
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