Performance of 1-(3-sulfopropyl)-3-methylimidazolium hydrogen sulfate as a catalyst for hardwood upgrading into bio-based platform chemicals
DATA:
2020-08-15
IDENTIFICADOR UNIVERSAL: http://hdl.handle.net/11093/1680
VERSIÓN EDITADA: https://www.mdpi.com/2073-4344/10/8/937
MATERIA UNESCO: 3303.03 Procesos Químicos ; 3310.05 Ingeniería de Procesos ; 3312.13 Tecnología de la Madera
TIPO DE DOCUMENTO: article
RESUMO
The acidic ionic liquid 1-(3-sulfopropyl)-3-methylimidazolium hydrogen sulfate ([C3SO3Hmim]HSO4) was employed as a catalyst for manufacturing polysaccharide-derived products (soluble hemicellulose-derived saccharides, furans, and/or organic acids) from Eucalyptus globulus wood. Operation was performed in aqueous media supplemented with [C3SO3Hmim]HSO4 and methyl isobutyl ketone, following two different processing schemes: one-pot reaction or the solubilization of hemicelluloses by hydrothermal processing followed by the separate manufacture of the target compounds from both hemicellulose-derived saccharides and cellulose. Depending on the operational conditions, the one-pot reaction could be directed to the formation of furfural (at molar conversions up to 92.6%), levulinic acid (at molar conversions up to 45.8%), or mixtures of furfural and levulinic acid (at molar conversions up to 81.3% and 44.8%, respectively). In comparison, after hydrothermal processing, the liquid phase (containing hemicellulose-derived saccharides) yielded furfural at molar conversions near 78%, whereas levulinic acid was produced from the cellulose-enriched, solid phase at molar conversions up to 49.5%.