|
authors |
Morais, ES; Freire, MG; Freire, CSR; Coutinho, JAP; Silvestre, AJD |
|
nationality |
International |
|
journal |
CHEMSUSCHEM |
|
author keywords |
biomass; deep eutectic solvents; furfural; green solvents; microwave heating |
|
keywords |
LIGNOCELLULOSIC BIOMASS; HEMICELLULOSE; XYLOSE; POLYSACCHARIDES; DERIVATIVES; HYDROLYSIS; CHEMISTRY; LIGNIN; MEDIA; DES |
|
abstract |
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 gamma-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 degrees 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. |
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publisher |
WILEY-V C H VERLAG GMBH |
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issn |
1864-5631 |
|
isbn |
1864-564X |
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year published |
2020 |
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volume |
13 |
|
issue |
4 |
|
beginning page |
784 |
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ending page |
790 |
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digital object identifier (doi) |
10.1002/cssc.201902848 |
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web of science category |
Chemistry, Multidisciplinary; Green & Sustainable Science & Technology |
|
subject category |
Chemistry; Science & Technology - Other Topics |
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unique article identifier |
WOS:000508416600001
|
