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https://hdl.handle.net/10216/136366
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DC Field | Value | Language |
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dc.creator | Andreia F. Peixoto | |
dc.creator | Ruben Ramos | |
dc.creator | Manuela M. Moreira | |
dc.creator | Olívia Salomé G. P. Soares | |
dc.creator | Lucília Ribeiro | |
dc.creator | Manuel Fernando R. Pereira | |
dc.creator | Cristina Delerue Matos | |
dc.creator | Cristina Freire | |
dc.date.accessioned | 2022-09-07T21:56:16Z | - |
dc.date.available | 2022-09-07T21:56:16Z | - |
dc.date.issued | 2021 | |
dc.identifier.issn | 0016-2361 | |
dc.identifier.other | sigarra:497700 | |
dc.identifier.uri | https://hdl.handle.net/10216/136366 | - |
dc.description.abstract | In this work, a series of novel -SO3H functionalized biochar materials were prepared and investigated for the first time as catalysts for the production of fuel additive ethyl levulinate (EL) from biomass-derived 5-hydroxymethylfurfural (HMF). The employed biochar was directly produced from vineyard pruning wastes by a simple hydrothermal treatment using water in subcritical conditions followed by 3 different one-step sulfonation processes. The effects of sulfonating agent, reaction temperature, reaction time and alcohol solvent were examined. Full HMF conversion together with outstanding EL yields (over 84%) were achieved at 130 degrees C and after 6 h over the biochar functionalized with the organosilane 2-(4-chlorosulphonylphenyl)ethyltrimetoxysilane (BioC-S3). Catalyst characterization suggested that the high acid strength (0.983 mmol H+.g- 1) derived from the anchoring of arylsulfonic groups were responsible for the promotion of acid-driven etherification and ethanolysis steps. The BioC-S3 catalyst can be recycled without a significant loss of catalytic activity, indicating the stability of - SO3H organosilane group structure in the porous biochar. The obtained results offer a competitive alternative for the production of fuel additives, such as alkyl levulinates, using low-cost and easy-to-prepare biocharbased catalysts, all from lignocellulose resources, as an example to support a future exploitation of a potential biorefinery. | |
dc.language.iso | eng | |
dc.rights | restrictedAccess | |
dc.title | Production of ethyl levulinate fuel bioadditive from 5-hydroxymethylfur-fural over sulfonic acid functionalized biochar catalysts | |
dc.type | Artigo em Revista Científica Internacional | |
dc.contributor.uporto | Faculdade de Engenharia | |
dc.identifier.doi | 10.1016/j.fuel.2021.121227 | |
dc.identifier.authenticus | P-00V-4S7 | |
Appears in Collections: | FEUP - Artigo em Revista Científica Internacional |
Files in This Item:
File | Description | Size | Format | |
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497700.pdf Restricted Access | 1.51 MB | Adobe PDF | Request a copy from the Author(s) |
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