Role of peracetic acid on the disruption of lignin packing structure and its consequence on lignin depolymerisation
| العنوان: | Role of peracetic acid on the disruption of lignin packing structure and its consequence on lignin depolymerisation |
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| المؤلفون: | Sarah D. Burton, Mariefel V. Olarte, Marie S. Swita, John R. Cort, Heather Job, Susanne B. Jones, Xiaowen Chen, Udishnu Sanyal, Xiao Zhang, Michael P. Wolcott, Mark E. Bowden, Ruoshui Ma, Pimphan A. Meyer |
| المصدر: | Green Chemistry. 23:8468-8479 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | chemistry.chemical_classification, Ketone, 010405 organic chemistry, Chemistry, Oxide, macromolecular substances, Nuclear magnetic resonance spectroscopy, biochemical phenomena, metabolism, and nutrition, 010402 general chemistry, 01 natural sciences, Pollution, 0104 chemical sciences, Catalysis, chemistry.chemical_compound, Monomer, Peracetic acid, Environmental Chemistry, Organic chemistry, Lignin, Macromolecule |
| الوصف: | Peracetic acid (PAA) is an effective oxidant capable of solubilising lignin and efficiently depolymerising it to selective phenolic compounds; however, the specific role by which PAA initiates the depolymerisation is still elusive. Herein, interaction between PAA and the lignin macromolecule and the consequent structural changes of the latter were studied by characterising the lignin packing structure and its associated changes during the oxidation process. While the lignin packing structure and its changes associated with the PAA-mediated oxidation were probed by X-ray diffraction, the impact of the PAA on different chemical functionalities present in the lignin structure was established by 13C and 1H–13C heteronuclear single-quantum coherence nuclear magnetic resonance (NMR) spectroscopy. Combining the NMR spectroscopy results, and the product distribution, we conclude that the predominant reaction pathway for the oxidative depolymerisation of lignin with PAA is the Baeyer–Villiger oxidation of the ketone formed by the oxidation of the benzylic hydroxyl group adjacent to the β-O-4 linkage. The experimental evidence provided herein corroborated that PAA instigates oxygen insertion to the lignin macromolecule resulting in disruption of its packing structures and facilitates depolymerisation. We also investigated various metal oxide and mixed metal oxide catalysts to identify effective catalysts that further enhance the efficiency of PAA-mediated depolymerisation of lignin and produce selective monomeric phenolic compounds. Techno-economic analysis was also conducted to identify the key parameters associated with this oxidative process that need to be considered for possible commercial application. |
| تدمد: | 1463-9270 1463-9262 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::50465f63f37e4ffab55bb095aea61b95 https://doi.org/10.1039/d1gc02300d |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........50465f63f37e4ffab55bb095aea61b95 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14639270 14639262 |
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