Propylene production from steam crackers depends upon the operating rates of the steam cracker and the type of feedstock. With the ethylene and gasoline being the main products from SC and conventional FCC, respectively, propylene and other light olefins are obtained as byproducts from these technologies. It accounts for about 60–65 % of the world’s propylene production, with the established refinery FCC process accounting for 30 % and the remainder is produced on purpose using metathesis or propane dehydrogenation. SC is an established technology for the production of light olefins, such as ethylene and propylene.
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