carbon rejection

carbon rejection
Crude oil contains a wide variety of hydrocarbon molecules, ranging from a single carbon atom (methane) to very long chain molecules. The lighter molecules that make up gasoline, jet and diesel contain a lower ratio of carbon to hydrogen than the heavier molecules. In order to convert the heavier molecules to lighter products, the heavier molecules must not only be cracked, but the excess carbon must be removed to reduce the carbon to hydrogen ratio of the cracked material.

Petroleum refining glossary. 2013.

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