Ukwakha kuyinqubo yokuqala yokwelapha ukushisa kwe-petroleum coke. Ngokuvamile, izinga lokushisa lokushisa eliphezulu lokwelapha ukushisa lingaba ngu-1,300℃. Ihlose ukususa ukungcola okufana namanzi, ama-volatiles, i-sulfur kanye ne-hydrogen ku-petroleum coke, kanye nokuqaphela isakhiwo esishintshayo kanye nezakhiwo ze-physicochemical zezinto ezahlukahlukene zekhabhoni. Le ndlela inganciphisa okuqukethwe kwe-hydrogen kwemikhiqizo yokuvuselelwa kwe-petroleum coke futhi ithuthukise izinga le-graphitization, ngaleyo ndlela ithuthukise amandla ayo okusebenza, ubuningi, ukuhanjiswa kukagesi kanye nokumelana ne-oxidation.
