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.

Reactivity of cellulose during hydrothermal carbonization of lignocellulosic biomass / Volpe, Maurizio; Messineo, Antonio; Mäkelä, Mikko; Barr, Meredith R.; Volpe, Roberto; Corrado, Chiara; Fiori, Luca. - In: FUEL PROCESSING TECHNOLOGY. - ISSN 0378-3820. - STAMPA. - 206:(2020), pp. 106456.1-106456.7. [10.1016/j.fuproc.2020.106456]

Reactivity of cellulose during hydrothermal carbonization of lignocellulosic biomass

Volpe, Maurizio;Fiori, Luca
2020-01-01

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.
2020
Volpe, Maurizio; Messineo, Antonio; Mäkelä, Mikko; Barr, Meredith R.; Volpe, Roberto; Corrado, Chiara; Fiori, Luca
Reactivity of cellulose during hydrothermal carbonization of lignocellulosic biomass / Volpe, Maurizio; Messineo, Antonio; Mäkelä, Mikko; Barr, Meredith R.; Volpe, Roberto; Corrado, Chiara; Fiori, Luca. - In: FUEL PROCESSING TECHNOLOGY. - ISSN 0378-3820. - STAMPA. - 206:(2020), pp. 106456.1-106456.7. [10.1016/j.fuproc.2020.106456]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/285927
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