RT info:eu-repo/semantics/article
T1 Optimal conditions for hemicelluloses extraction from Eucalyptus globulus wood: hydrothermal treatment in a semi-continuous reactor
A1 Gallina, Gianluca
A1 Cabeza Sánchez, Álvaro
A1 Biasi, Pierdomenico
A1 García Serna, Juan
K1 Eucalyptus
AB Optimal conditions for hemicellulose extraction from wooden biomass in a semi-continuous system have been assessed in thiswork. This studywould constitute the first stage for a profitable and green industrial process. Eucalyptus globuluswas selected as rawmaterial due to its lowwater consumption, high growth and its efficiency in lignocellulose production.Moreover its cultivation is very popular in southern Europe. Samples of 5.0 g of wood were fractioned using a pressurized hot water semi-continuous system, to produce sugars (pentoses and hexoses) and a solid residue enriched in lignin.Five flow rates between 2.50 and 20.00 mL/min and four temperatures between 135.0 and 285.0 °C were tested in order to maximize the production of sugars, avoiding the formation of degradation products. Optimumconditions for the extraction of hemicellulose were identified at 185.0 °C and 5.00 mL/min, leading to a pentoses yield of 67.409wt%,with 0.702 wt% of degradation products. Almost all the pulp is extracted at 285.0 °C. SEM images show very well the changes in the wood structure at different temperatures.A kinetic model was developed, describing the extraction and hydrolysis of hemicellulose and cellulosewith absolute average deviations around 10% for sugar extracted mass.
SN 0378-3820
YR 2016
FD 2016
LK http://uvadoc.uva.es/handle/10324/21913
UL http://uvadoc.uva.es/handle/10324/21913
LA eng
NO Fuel Processing Technology 148 (2016) 350–360
NO Producción Científica
DS UVaDOC
RD 08-may-2024