Influence of Miscanthus Rhizome Pyrolysis Operating Conditions on Products Properties

Katerina Klemencova, Barbora Grycova and Pavel Lestinsky
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Katerina Klemencova: Institute of Environmental Technology, Centre of Energy and Environmental Technologies, VSB—Technical University of Ostrava, 17. listopadu 15/2172, Poruba, 708 00 Ostrava, Czech Republic
Barbora Grycova: Institute of Environmental Technology, Centre of Energy and Environmental Technologies, VSB—Technical University of Ostrava, 17. listopadu 15/2172, Poruba, 708 00 Ostrava, Czech Republic
Pavel Lestinsky: Institute of Environmental Technology, Centre of Energy and Environmental Technologies, VSB—Technical University of Ostrava, 17. listopadu 15/2172, Poruba, 708 00 Ostrava, Czech Republic

Sustainability, 2022, vol. 14, issue 10, 1-15

Abstract: Waste from the Miscanthus production cycle may be a promising source of material for the pyrolysis and biochar production. The biochar can be used to enrich the soil on which the crop grows, thus increasing productivity. A sample of Miscanthus rhizomes was used as a raw material in a series of experiments in order to find the most suitable conditions for the preparation of biochar. Miscanthus biochar was prepared in a laboratory unit using four different temperatures (i.e., 400, 500, 600 and 700 °C). All pyrolysis products were subsequently evaluated in terms of their quality and product yields were determined. For a temperature of 600 °C and a residence time of 2 h, the appropriate properties of biochar were achieved and the process was still economical. The biochar contained a minimal number of polycyclic aromatic hydrocarbons and a high percentage of carbon. Surface area was measured to be 217 m 2 /g. The aqueous extract of biochar was alkaline.

Keywords: Miscanthus rhizomes; biochar; pyrolysis (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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