6533b857fe1ef96bd12b50ba

RESEARCH PRODUCT

Reactivity of cellulose during hydrothermal carbonization of lignocellulosic biomass

Roberto VolpeMaurizio VolpeAntonio MessineoMikko MäkeläMikko MäkeläLuca FioriMeredith Rose BarrChiara Corrado

subject

Thermogravimetric analysis020209 energyGeneral Chemical EngineeringEnergy Engineering and Power TechnologyLignocellulosic biomass02 engineering and technologyHydrothermal carbonizationBirchwoodchemistry.chemical_compoundHydrothermal carbonization020401 chemical engineeringSettore BIO/13 - Biologia Applicata0202 electrical engineering electronic engineering information engineeringSolid biofuelLignin0204 chemical engineeringCelluloseFourier transform infrared spectroscopyAromatizationAcid hydrolysiCellulose reactivityFuel TechnologychemistryAcid hydrolysisNuclear chemistrySettore AGR/16 - Microbiologia Agraria

description

Abstract Hydrothermal carbonization (HTC) of pure cellulose (CE) and birchwood (BW) samples was carried out at temperatures between 160 and 280 °C, 0.5 h residence time and biomass-to-water ratio 1:5, to investigate the reactivity of cellulose in lignocellulosic biomass. Thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR) showed that the CE samples remained unaltered at temperatures up to 220 °C, but were significantly decomposed at 230 °C producing a thermal recalcitrant aromatic and high energy-dense material. FTIR showed that dehydration and aromatization reactions occurred at temperature equal or higher than 230 °C for the CE samples while a similar increase in aromatization for the BW hydrochars was evident only at temperatures equal or higher than 260 °C. Acid hydrolysis, TGA and FTIR suggested that a higher thermal resistance of naturally occurring cellulose in BW (when compared to CE sample) could be related to a ‘protecting shield’ offered by interlinked lignin in the plant matrix.

yearjournalcountryeditionlanguage
2020-09-01
10.1016/j.fuproc.2020.106456http://hdl.handle.net/10447/423038