IGraphitized Petroleum Coke (GPC) yimathiriyeli ekrwada eyimfuneko kwishishini lesinyithi, esetyenziswa ngokubanzi njengekhabhoni yokukhulisa (i-recarburizer) kwiinkqubo zentsimbi kunye nokuphosa. Iveliswa nge-graphitization ephezulu yokushisa kwe-petroleum coke kwi-2,500-3,500 ° C, ebonakaliswe ngumxholo wayo ophezulu wekhabhoni, i-sulfure ephantsi, kunye namanqanaba aphantsi okungcola. I-GPC yaziwa ngezinga layo eliphezulu lokufunxa, ukusebenza okuzinzile, kunye nokusebenza kakuhle ekunciphiseni izinto eziyingozi njengesulfure kunye nenitrogen kwisinyithi esinyibilikisiweyo. Oku kuyenza ibe yimathiriyeli efanelekileyo ekuveliseni umgangatho ophezulu wentsimbi, intsimbi etyhidiweyo, kunye nealloys.
