Graphitized Petroleum Coke (GPC) waa shay lagama maarmaanka u ah warshadaha birta, oo si weyn loogu isticmaalo kicinta kaarboonka (dib-u-karbuure) samaynta birta-samaynta iyo habka shubista. Waxaa lagu soo saaraa garaafyada heerkulka sare ee kookaha batroolka ee 2,500-3,500 ° C, oo lagu garto kaarboonka joogtada ah ee sarreeya, baaruud hoose, iyo heerar hoose oo wasakh ah. GPC waxay caan ku tahay heerka nuugista sare, waxqabadka xasilloon, iyo hufnaanta yaraynta walxaha waxyeelada leh sida sulfur iyo nitrogen ee birta dhalaalaysa. Tani waxay ka dhigaysaa shay ku habboon soo saarista birta tayada sare leh, birta la shubay, iyo alloysyada.
