4.7 Article Proceedings Paper

Hydrothermal carbonization, torrefaction and slow pyrolysis of Miscanthus giganteus

Journal

ENERGY
Volume 140, Issue -, Pages 1292-1304

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2017.03.031

Keywords

Hydrothermal carbonization; Torrefaction; Slow pyrolysis; Miscanthus giganteus

Funding

  1. AGH [11.11.110.423]

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The main aim of the paper is to analyze the effect of different pretreatment processes (HTC, torrefaction and slow pyrolysis) on the properties of Miscanthus giganteus. In this study, the HTC process was conducted in a Zipperclave Stirred Reactor under following parameters: temperature (180, 200 and 220 degrees C), pressure (<2.5 MPa) and residence time (2, 3, 4, 6, and 12 h). The effect of temperature and residence time of torrefaction and slow pyrolysis were studied in specially designed laboratory apparatus. Torre faction temperature was held at 230, 260, and 290 degrees C, and residence time was specified for 0.5, 1.0 and 1.5 h. The preliminary study for slow pyrolysis processes were performed at 350, 400, 450 and 500 degrees C for 0.5, 1.0 and 1.5 h. The thermal behaviour of raw and pretreated Miscanthus was investigated by TGA analysis. Finally, HTC, torrefaction and slow pyrolysis processes proved an improvement in the combustible characteristics of the obtained biochars compared to raw biomass by the spectacular increase of carbon content 36%, 34% and 80%, respectively. (C) 2017 Elsevier Ltd. All rights reserved.

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