The data derived from fitting a linear line of best-fit over the various temperature regimes in the Arrhenius plot.

<p>Values of <i>E</i>_<i>a</i> are in kJ/mol.</p

A ceramic combustion boat filled with ~ 3.0 g PGA particulate of size 2.0–6.0 mm.

<p>A ceramic combustion boat filled with ~ 3.0 g PGA particulate of size 2.0–6.0 mm.</p

The effect of increasing temperature on the graphite oxidation rate for both air and 60% O₂.

<p>The effect of increasing temperature on the graphite oxidation rate for both air and 60% O₂.</p

The effect of O₂ concentration and flow rate on the maximum graphite oxidation rate.

<p>The figures assume that that 1 mole of O₂ produces one mole of CO₂, as described by <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0182860#pone.0182860.e007" target="_blank">Eq 7</a>.</p

The effect of flow rate on oxidation induced weight loss at 1000°C in both air and 60% O₂.

<p>The effect of flow rate on oxidation induced weight loss at 1000°C in both air and 60% O₂.</p

The effect of temperature on graphite oxidation rate in air (top) and 60% O₂ (bottom).

<p>The effect of temperature on graphite oxidation rate in air (top) and 60% O₂ (bottom).</p

A schematic of the thermal treatment apparatus used.

<p>A schematic of the thermal treatment apparatus used.</p

The various kinetic regimes thought to be involved in graphite oxidation.

<p>Artwork inspired by Clark et al [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0182860#pone.0182860.ref038" target="_blank">38</a>]. The temperature ranges shown are an approximation and can vary depending on many factors.</p

Arrhenius plot showing the temperature dependence of graphite oxidation rates from 500–1200°C.

<p>Data from T < 500°C is omitted due to negligible oxidation rates.</p

The effect of increasing oxidant flow rate on the graphite oxidation rate.

<p>Experiments carried out at 1000°C and in air (top) and 60% O₂ (bottom).</p