Hidrothermal liquefaction of lignocellulosic residue to produce sustainable materials: fractions characterization
Solange Kazue Utimura, Denise Crocce Romano Espinosa, Marco Antonio das Neves, Isao Kobayashi, Mitsutoshi Nakajima, Cristina Stewart Bogsan
In this study, hydrothermal liquefaction (HTL) of sugarcane bagasse (SCB) acquired in Okinawa (Japan) was performed at 170, 200 and 230 °C, pressures from 1 to 3 MPa and retention time of 30 min. These experiments were executed in a 500 mL reactor with 5 g SCB and 95 mL deionized water in inert nitrogen condition. The highest sugar yields were obtained at the concentration of 20.25 g/L at 230 °C, 3 MPa and 30 min. In accordance with elemental analysis, highest carbon content values were 55.31% at 200 °C and 59.9% at 230 °C. The chemical composition was analyzed through SEM and FTIR. HTL has been applied to obtain biomaterials from agricultural wastes which can be incorporated or converted into new value-added products. HTL in subcritical conditions is an interesting hydrolysis process and has advantages of reduced energy consumption and water reaction environment.
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