Production of ethyl levulinate fuel bioadditive from 5-hydroxymethylfur-fural over sulfonic acid functionalized biochar catalysts

• Tipo: Artigo em Revista Científica Internacional
• Data: 2021

Autores

Andreia F. Peixoto (Autor) Outra; Ruben Ramos (Autor) Outra; Manuela M. Moreira (Autor) Outra; Olívia Salomé G. P. Soares (Autor) FEUP; Lucília Ribeiro (Autor) FEUP; Manuel Fernando R. Pereira (Autor) FEUP; Cristina Delerue Matos (Autor) Outra; Cristina Freire (Autor) Outra

Revista

Título: Fuel

Vol. 303

Páginas: 1-9

ISSN: 0016-2361

Editora: Elsevier

Indexação

ISI Web of Knowledge - 25 Citações

ISI Web of Science - 9 Citações

Scopus - 27 Citações

Outras Informações

ID Authenticus: P-00V-4S7

DOI: 10.1016/j.fuel.2021.121227

Abstract (EN): 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9