Green coke (raw coke) is the primary solid carbonization product from high boiling hydrocarbon fractions obtained at temperatures below $900\text{K}$. It contains a fraction of matter that can be released as volatiles during subsequent heat treatment at temperatures up to approximately $1600\text{K}$. This mass fraction, the so-called volatile matter, is in the case of green coke between 4 and 15 wt.%, but it depends also on the heating rate.