I-coke ye-petroleum ene-calcined ngokuvamile inokuqukethwe okuphezulu kwekhabhoni okusukela ku-98% kuya ku-99.5%. Lokhu okuqukethwe okuphezulu kwekhabhoni kuqinisekisa ukusebenza okuhle kakhulu ekusetshenzisweni okuhlobene nekhabhoni, njengokukhiqizwa kwe-anode kanye nokwenza insimbi.