Understanding the formation of phenolic monomers during fractionation of birch wood under supercritical ethanol over iron based catalysts
| Autor: | Vincenzo Russo, Torbjörn A. Lestander, Päivi Mäki-Arvela, Narendra Kumar, Ajaikumar Samikannu, Ramakrishna Jogi, Pasi Virtanen, Jarl Hemming, Jyri-Pekka Mikkola |
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| Přispěvatelé: | Jogi, R., Maki-Arvela, P., Virtanen, P., Kumar, N., Hemming, J., Russo, Vincenzo, Samikannu, A., Lestander, T. A., Mikkola, J. -P. |
| Rok vydání: | 2020 |
| Předmět: |
Ethanol
Chemistry Isoeugenol 020209 energy Birch Supercritical ethanol Liquefaction Iron supported zeolite 02 engineering and technology Fractionation Supercritical fluid Catalysis chemistry.chemical_compound Monomer 020401 chemical engineering Chemical engineering Hydrogen atmosphere Hydrothermal liquefaction (HTL) Critical point (thermodynamics) Iron based 0202 electrical engineering electronic engineering information engineering Thermodynamic analysis 0204 chemical engineering |
| Zdroj: | Journal of the Energy Institute. 93:2055-2062 |
| ISSN: | 1743-9671 |
| DOI: | 10.1016/j.joei.2020.05.001 |
| Popis: | The liquefaction of biomass in ethanol, at the critical point, has high potential due to low temperature and pressure (243 °C, 63 bar) when compared with water (374 °C, 220 bar). The current study deals with the fractionation of birch wood powder which was liquefied under supercritical ethanol over acidic or non-acidic catalysts, 5 wt % Fe-Beta-H-150 and 5 wt % Fe–SiO2, respectively. Based on the results, the reaction mechanism for the formation of lignin degradation products was proposed. The main phenolic product was isoeugenol over 5 wt % Fe-Beta-H-150 while intermediate products, i.e. such as coniferyl, and sinapyl alcohol, 4-propenyl syringol, syringaresinol, as well as syringyldehyde reacted rapidly further. The thermodynamic analysis was performed by Joback approach and using Gibbs-Helmholtz equation supporting the obtained results. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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