Graphitized Petroleum Coke (GPC) ndi chinthu chofunikira kwambiri pamakampani opanga zitsulo, chomwe chimagwiritsidwa ntchito kwambiri ngati chowonjezera mpweya (recarburizer) popanga zitsulo ndi njira zopangira zitsulo. Chimapangidwa kudzera mu graphitization ya kutentha kwambiri ya petroleum coke pa 2,500-3,500°C, yomwe imadziwika ndi kuchuluka kwa mpweya wokhazikika, sulfure yochepa, komanso kuchuluka kwa kuipitsidwa kochepa. GPC imadziwika ndi kuchuluka kwake koyamwa, magwiridwe antchito okhazikika, komanso magwiridwe antchito abwino pochepetsa zinthu zoopsa monga sulfure ndi nayitrogeni mu chitsulo chosungunuka. Izi zimapangitsa kuti ikhale chinthu chabwino kwambiri chopangira chitsulo chapamwamba, chitsulo chosungunuka, ndi alloys.
