Controlled hydrothermal carbonization of wood-derived lignin-rich lignocellulose: Redefining pyrolytic pathways to tailored biochar and hydrogen-enriched syngas
This research illustrates the efficacy of hydrothermal carbonization (HTC) as a pretreatment method to improve the pyrolytic performance of wood-derived lignin-rich lignocellulosic biomass (LB), supported by thorough characterization of its derived products such as syngas, tar, and biochar. A system...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universidad de Sevilla (US) |
| Repositorio: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:idus.us.es:11441/180002 |
| Acceso en línea: | https://hdl.handle.net/11441/180002 https://doi.org/10.1016/j.jaap.2025.107342 |
| Access Level: | acceso abierto |
| Palabra clave: | Lignin-rich lignocellulosic biomass Hydrothermal carbonization Pyrolysis Syngas Biochar Tar composition Biomass valorization |
| Sumario: | This research illustrates the efficacy of hydrothermal carbonization (HTC) as a pretreatment method to improve the pyrolytic performance of wood-derived lignin-rich lignocellulosic biomass (LB), supported by thorough characterization of its derived products such as syngas, tar, and biochar. A systematic comparison of non-HTC-treated LB and HTC-treated LB through their respective pyrolytic-derived biochar (NLB, HLB) obtained across temperatures (400-1000°C) revealed their basic structural and reactivity variations. HTC resulted in a new carbonyl peak with a 28 % increase in Cdouble bondO concentration in derived biochar, with partial aromatization evidenced by Cdouble bondC bonds at 1509 cm-¹ . Spectroscopic analysis confirmed that HTC promoted a defective carbon structure in derived biochar while enhancing its crystallinity and maintaining its integrity even at higher temperatures. XPS analysis demonstrated that at 1000°C, HLB-T10 retained active oxygen functionalities, while its associated pyrolytic products H2 and CO boosted from 22.45 % to 40.4 % and 32.3–33.4 %, respectively, with drastically lowered CO₂ emissions from 39.95 % to 11.5 %. Regulated deoxygenation routes cause tar composition to shift toward desirable aromatic chemicals. This comprehensive strategy offers a sustainable valorization technique that increases syngas generation efficiency, lowers emissions, and optimizes biorefinery product selection. |
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