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http://hdl.handle.net/10773/27722
Título: | Enhanced conversion of xylan into furfural using acidic deep eutectic solvents with dual solvent and catalyst behavior |
Autor: | Morais, Eduarda S. Freire, Mara G. Freire, Carmen S. R. Coutinho, João A. P. Silvestre, Armando J. D. |
Palavras-chave: | Biomass Deep eutectic solvents Furfural Green solvents Microwave heating |
Data: | 21-Fev-2020 |
Editora: | Wiley‐VCH |
Resumo: | An efficient process for the production of furfural from xylan by using acidic deep eutectic solvents (DESs), which act both as solvents and catalysts, is developed. DESs composed of cholinium chloride ([Ch]Cl) and malic acid or glycolic acid at different molar ratios, and the effects of water and γ-valerolactone (GVL) contents, solid/liquid (S/L) ratio, and microwave heating are investigated. The best furfural yields are obtained with the DES [Ch]Cl:malic acid (1:3 molar ratio)+5 wt % water, under microwave heating for 2.5 min at 150 °C, a S/L ratio of 0.050, and GVL at a weight ratio of 2:1. Under these conditions, a remarkable furfural yield (75 %) is obtained. Direct distillation of furfural from the DES/GVL solvent and distillation from 2-methyltetrahydrofuran (2-MeTHF) after a back-extraction step enable 89 % furfural recovery from 2-MeTHF. This strategy allows recycling of the DES/GVL for at least three times with only small losses in furfural yield (>69 %). This is the fastest and highest-yielding process reported for furfural production using bio-based DESs as solvents and catalysts, paving the way for scale-up of the process. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/27722 |
DOI: | 10.1002/cssc.201902848 |
ISSN: | 1864-5631 |
Versão do Editor: | https://onlinelibrary.wiley.com/doi/full/10.1002/cssc.201902848 |
Aparece nas coleções: | CICECO - Artigos DQ - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Furfural_RIA.pdf | 615.33 kB | Adobe PDF | Ver/Abrir | |
ESI_Furfural_RIA.pdf | 260.89 kB | Adobe PDF | Ver/Abrir |
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