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Cracking
Refining process to break large molecules into smaller ones. Principal cracking techniques are:
Thermal cracking: Heating of hydrocarbons to very high temperatures, usually above 450ý C. Thermal cracking is no longer widely used, except in:
Visbreaking: Thermal cracking of viscous crude residues to make fuel oil, and in:
Delayed Coking: Thermal cracking of atmospheric/vacuum residues to make electrode grade coke.
Catalytic cracking: Cracking using catalysts to enhance molecule breaking, particularly in the production of high octane gasoline.
Hydrocracking: While thermal and catalytic cracking produce shorter hydrocarbon molecules largely by disposing of the excess carbon atoms, hydrocracking inserts hydrogen atoms to achieve the same effect.
Steam cracking: A petrochemical process which produces olefins, particularly ethylene, and, in some cases, aromatics. Similar to thermal cracking
Co-Cracking: A petrochemical process in which the c4 stream from an ethylene plant is recycled into the feedstock.
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- Part of Speech: noun
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- Industry/Domain: Energy
- Category: Energy trade
- Company: Platts
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