Hidrothermal liquefaction of lignocellulosic residue to produce sustainable materials: fractions characterization

• Published in: Tecnologia em metalurgia, materiais e mineração Vol. 18; p. e2483
• Main Authors: Utimura, Solange Kazue, Espinosa, Denise Crocce Romano, Neves, Marco Antonio das, Kobayashi, Isao, Nakajima, Mitsutoshi, Bogsan, Cristina Stewart
• Format: Journal Article
• Language: English; Portuguese
• Published: Sao Paulo Associação Brasileira de Metalurgia, Materiais e Mineração 2021
• Subjects: Agricultural wastes; Bagasse; Biomedical materials; Carbon content; Chemical composition; Deionization; Energy consumption; Lignocellulose; Liquefaction; Sugarcane
• ISSN: 2176-1515; 2176-1523
• DOI: 10.4322/2176-1523.20212483

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.