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Combustion kinetics of hydrochar from cow-manure digestate via thermogravimetric analysis and peak deconvolution

descriptionPublicationkeyboard_double_arrow_right Article 01 Jun 2022 Italy Publisher:Elsevier BVJournal:Bioresource Technology, volume 353, page 127,142 (issn: 0960-8524,

Authors: Benedetti V; Pecchi M; Baratieri M;

doi: 10.1016/j.biortech.2022.127142

pmid: 35413420

handle: 11572/438311

Combustion kinetics of hydrochar from cow-manure digestate via thermogravimetric analysis and peak deconvolution

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Abstract

Hydrothermal carbonization (HTC) can convert wet biomass into hydrochar (HC), a solid carbonaceous material exploitable as fuel. In this study, HTC was applied to anaerobic digestate from cow manure. HCs obtained at three HTC temperatures (180, 220, 250 °C) were characterized in detail and their combustion behavior was investigated by thermogravimetric analysis (TGA) coupled with peak deconvolution. Increasing HTC temperatures increased the fixed carbon content (17.9-20.7%), the ash content (27.2-32.5%) and the calorific value (14.3-18.2 MJ/kg), while decreased the hydrogen (5.01-4.54%) and oxygen content (24.09-12.35%) of HCs. DTG profiles peak deconvolution unveils the presence of five major components in the HCs. HCs combustion kinetics were studied applying the KAS method. Average apparent activation energy values of 100, 88, 67 kJ mol-1 were obtained for HC180, HC220, HC250, respectively. HTC at 250 °C produced the HC with the best fuel characteristics.

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Italy

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Keywords

Temperature, Hydrothermal carbonization, Cow manure digestate, Hydrochar, Thermogravimetric analysis, Combustion kinetics, Carbon, Manure, Kinetics, Animals, Cattle, Female, Biomass

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