Ubwoko bwa kokiya yabonetse mugutinda gukata amavuta asigaye.Ibyingenzi ni igice cyerekana ishusho ya karubone.Ni umukara mu ibara kandi ryoroshye, muburyo bwa granules zegeranye, kandi ntishobora gushonga.Ibigize ibice ahanini ni karubone, rimwe na rimwe birimo hydrogène nkeya, azote, sulfure, ogisijeni nibintu bimwe na bimwe byuma, kandi rimwe na rimwe bifite ubuhehere.Ikoreshwa cyane muri metallurgie, inganda zimiti nizindi nganda nka electrode cyangwa ibikoresho fatizo byo gukora ibikomoka kumiti.

Imiterere ya kokiya ya peteroli iratandukanye nuburyo bukoreshwa, imiterere yimikorere nimiterere yibiryo.Kokiya ya peteroli ikomoka mu mahugurwa ya peteroli ya kokiya yitwa coke icyatsi, irimo ibintu bimwe na bimwe bihindagurika bya hydrocarubone ya karubone.Kokiya yicyatsi irashobora gukoreshwa nkibikomoka kuri peteroli.Electrode ikoreshwa mugukora ibyuma igomba kubarwa mubushyuhe bwinshi kugirango irangize karubone kandi igabanye ibintu bihindagurika kugeza byibuze.

Kugaragara kwa kokiya ikorerwa mumahugurwa menshi ya peteroli ya kokiya ni umukara-umukara porous ikomeye idasanzwe.Ubu bwoko bwa kokiya nabwo bwitwa sponge coke.Ubwoko bwa kabiri bwa peteroli ya kokiya ifite ubuziranenge bwitwa inshinge ya kokiya, ikwiranye na electrode bitewe n’amashanyarazi make yo hasi hamwe na coefficient yo kwagura ubushyuhe.Ubwoko bwa gatatu bwa peteroli ikomeye yitwa kokiya.Iyi kokiya imeze nkigisasu, ifite ubuso buto kandi ntabwo byoroshye kokiya, ntabwo rero ikoreshwa cyane.

Kokiya ya peteroli ifata amavuta aremereye cyangwa andi mavuta aremereye nyuma yo gutobora amavuta ya peteroli nkibikoresho fatizo, ikanyura mu itanura ry’itanura rya 500 ℃ ± 1 ℃ itanura rishyushya umuvuduko mwinshi, ku buryo ibikorwa byo guturika no guhunika bikorerwa mu munara wa kokiya, hanyuma kokiya ikonjeshwa mugihe runaka.Guteka no guteka bitanga peteroli ya kokiya.