Eucalyptus Bark Charcoal: the Influence of Carbonization Temperature in Thermal Behavior

Abstract

Eucalyptus bark is a waste generated in large volume and has been used as a source of energy. This study tries to use the Eucalyptus sp. bark as a source of raw material for the charcoal production and to study the influence of pyrolysis temperatures on charcoal properties. Charcoal was produced at different temperatures: 300, 400 and 500 °C, and their properties were determined by proximate analysis, higher heating value and thermogravimetric analysis. It was observed that higher pyrolysis temperature resulted in increase of the fixed carbon content and higher heating value. In the thermogravimetry and derivative thermogravimetry curves it was possible to determine the differences in the thermal stability of charcoal produced. It can be concluded that the eucalyptus bark charcoal is an alternative for the energy reutilization of this waste and also can be used as charcoal for heating.

Biochar produced from poultry litter waste

“…The fixed carbon content was slightly lower (T1 = 43.19% and T5 = 34.10%) compared to the to the wheat straw biochar, for example, where a value of 52% was observed with biochar treated at 400 °C with a residence time of 2h (Junna et al, 2016). Also, Padilla et al (2019) produced charcoal from eucalyptus bark and the fixed carbon was 47% (400 ºC) with a residence time of 3 h. The lower values for fixed carbon in this study can be explained by high ash content (T1 = 33.66% and T5 = 53.79%).…”

“…The process conditions also influence the physical and chemical properties of biochar, as well as its morphology. In the pyrolysis process, as the temperature range increased, the percentage of charcoal decreased (Padilla et al, 2019;Yaashika et al, 2020).…”

“…Some studies also corroborate the ideal temperature of 450 °C for biomass pyrolysis. The pyrolysis for charcoal production is often conducted at temperatures of approximately 450 °C (<500 °C) (Padilla et al, 2019).…”

“…In general, the ash content of the wood is <1% (de Carvalho et al, 2020;da Silva et al, 2018). The high values of the ash content are related to the impurities in the material (Padilla et al, 2019). Milling, heaping, and loading occurs when the poultry litter is collected from the farm.…”