Ukubumba yinkqubo yokuqala yonyango lobushushu be-petroleum coke. Ngokubanzi, ubushushu bonyango lobushushu obuphezulu bumalunga ne-1,300℃. Ijolise ekususeni ukungcola okufana namanzi, ii-volatiles, i-sulfur kunye ne-hydrogen kwi-petroleum coke, kunye nokuqonda utshintsho lwesakhiwo kunye neepropati ze-physicochemical zezinto ezahlukeneyo zekhabhoni. Le ndlela inokunciphisa umxholo we-hydrogen kwiimveliso zokuvuselelwa kwe-petroleum coke kwaye iphucule izinga le-graphitization, ngaloo ndlela iphucula amandla ayo oomatshini, uxinano, ukuqhuba kombane kunye nokumelana ne-oxidation.
