Electrical resistivity of heat-treated charcoal
DOI:
https://doi.org/10.17159/Abstract
The aim of this investigation was to determine effect that high temperature heat treatments have on the electrical resistivity of charcoal. This included considering the effect of different wood types (eucalyptus and black wattle), temperatures, and residence times on the resistivity. The pyrolysis process was conducted in a retort at a temperature of 700 °C. The temperature range for the heat treatments was 800 °C to 1800 °C, and the range for the residence times was 60 min to 120 min. After each heat treatment, the samples were allowed to cool down, and the resistivities were then measured at room temperature using the four-probe measurement technique. It was found that as the heat treatment temperature increased the electrical resistivity of the charcoal decreased and began to approach an asymptotic value at higher temperatures. Longer residence time decreased the resistivity, but this effect was small.Downloads
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