title: Modeling of biomass fractionation in a lab-scale biorefinery: Solubilization of hemicellulose and cellulose from holm oak wood using subcritical water.
abstract: Lignocellulose fractionation is a key biorefinery process that need to be understood. In this work, a comprehensive study on hydrothermal-fractionation of holm oak in a semi-continuous system was conducted. The aim was to develop a physicochemical model in order to reproduce the role of temperature and water flow over the products composition. The experiments involved two sets: at constant flow (6mL/min) and two different ranges of temperature (140-180 and 240-280°C) and at a constant temperature range (180-260°C) and different flows: 11.0, 15.0 and 27.9mL/min. From the results, temperature has main influence and flow effect was observed only if soluble compounds were produced. The kinetic model was validated against experimental data, reproducing the total organic carbon profile (e.g. deviation of 33%) and the physicochemical phenomena observed in the process. In the model, it was also considered the variations of molecular weight of each biopolymer, successfully reproducing the biomass cleaving.
authors.affiliation: High Pressure Processes Group, Department of Chemical Engineering and Environmental Tech., University of Valladolid, 47011 Valladolid, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Cabeza
authors.affiliation: Planta Piloto de Ingeniería Química, PLAPIQUI-Universidad Nacional del Sur-CONICET, Camino La Carrindanga km 7, 8000 Bahía Blanca, Buenos Aires, Argentina.
authors.forename: C M
authors.initials: CM
authors.lastname: Piqueras
authors.affiliation: High Pressure Processes Group, Department of Chemical Engineering and Environmental Tech., University of Valladolid, 47011 Valladolid, Spain.
authors.forename: F
authors.initials: F
authors.lastname: Sobrón
authors.affiliation: High Pressure Processes Group, Department of Chemical Engineering and Environmental Tech., University of Valladolid, 47011 Valladolid, Spain. Electronic address: jgserna@iq.uva.es.
authors.forename: J
authors.initials: J
authors.lastname: García-Serna
mesh_terms: D018533:Biomass; D001709:Biotechnology / Q000379:methods; D002482:Cellulose / Q000737:chemistry*; D005591:Chemical Fractionation / Q000295:instrumentation / Q000379:methods*; D004867:Equipment Design; D029962:Fagaceae / Q000737:chemistry; D007700:Kinetics; D008031:Lignin / Q000737:chemistry; D008962:Models, Theoretical; D011134:Polysaccharides / Q000737:chemistry*; D013696:Temperature; D014867:Water / Q000737:chemistry; D014934:Wood / Q000737:chemistry
chemical_list: D011134:Polysaccharides; D014867:Water; C036909:lignocellulose; C007916:hemicellulose; D002482:Cellulose; D008031:Lignin
keywords: Biorefinery; Holm oak; Hydrothermal fractionation; Modeling; Subcritical water