IMAM   24519
INSTITUTO DE MATERIALES DE MISIONES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
FRACTIONATION OF PINUS RADIATA WOOD BY COMBINATION OF STEAM EXPLOSION AND SOLVENT DELIGNIFICATION
Autor/es:
CAMILA M. IMLAUER; VERGARA, PRISCILA; AREA, MARÍA CRISTINA; REVILLA, ESTEBAN; FERNANDO E. FELISSIA; VILLAR, JUAN CARLOS
Lugar:
Córdoba
Reunión:
Workshop; 1st International Workshop of Biorefinery of Lignocellulosic materials; 2015
Resumen:
Second generation biorefineries are a promising alternative to the first generation based on sugar plants or cereals. However, the exploitation of the polysaccharides needs a pretreatment to make them accessible to the action of enzymes or chemicals. Pretreatments improve the lignocellulose accessibility by removing hemicelluloses and/or lignin and by reducing cellulose crystallinity. For any pretreatment the energy/cost involved must not be greater than the energy/benefit obtained from the biomass. Hydrolysis processes (hot water or steam) and dilute acid hydrolysis are commonly used although they can generate by-products which inhibit the further stages of saccharification and fermentation. Moreover, these pretreatments are usually applied to herbaceous and hardwoods residues but not to the coniferous species.Lignocellulose fractionation with solvents does not produce inhibitors; it is applicable to any type of vegetal species and produces a sulfur-free lignin with many potential uses. The main bottleneck of this procedure is the cost of solvent recovery. In this work, a sequential combination of steam explosion and solvent delignification is proposed for the fractionation of Pinus radiata.A cellulose-rich solid (67%) could be obtained from P. radiata chips with this sequence of treatments and after 1 hour of delignification. The more important effect is that saccharification with enzymes of the cellulosic residue is clearly improved after solvent delignification.