Kokiya ya peteroli nigisigara cyimyanda mugikorwa cyo gutunganya peteroli. Graphitisation nigikorwa cyo guhindura peteroli ya kokiya muri grafite nyuma yo kuvura ubushyuhe bwinshi. Muri iki gikorwa, kokiya ya peteroli izahabwa amashanyarazi kandi ivurwe kuri 3000 ℃, kuburyo imiterere ya karubone ya karubone ya peteroli ya kokiya izahinduka kuva muburyo budasanzwe ikajya muburyo bumwe. Kokiya ya peteroli muri ubu buryo irashobora kubora neza ikabora mu cyuma gishongeshejwe, Ibyinshi muri rusange byongera imyuka ya karubone ku isoko ni ibyongera karubone byongera amavuta ya kokiya.
Igishushanyo cya peteroli Coke / GPC
1. FC: 98% min S: 0.05% max Ash: 1.0% max VM: 1.0% max Ubushuhe: 0.5% max N: 0.03% max 2. FC: 98.5% min, S 0.05% max, Ash 0.7% max, VM0.8% max, Ubushuhe: 0.5% max, N: 0,03% 3. FC: 99% min, S 0.03% max, Ash 0.5% max, VM0.5% max, Ubushuhe: 0.5% max, N: 0,03%