catalytic cracking

noun

Definition of catalytic cracking

  1. :  cracking of petroleum oils (as gas oils or diesel oils) especially for the production of high-octane gasoline in the presence of a catalyst (as clay) in various forms (as pellets or beads either stationary in a fixed bed or moving through the oil or as a fine powder fluidized by a stream of air or hydrocarbon vapors) —distinguished from thermal cracking

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