Gasoline riser reactor
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In the FDFCC catalytic cracking unit, the feed to the gasoline riser reactor is gasoline produced by the heavy oil riser reactor; what is the main component in the gasoline fraction that is converted into propylene?
In gasoline components, straight-chain or aromatic compounds with side chains, or naphthenes, undergo chain scission under the action of high temperature and catalysts to produce olefins. As propylene increases, all gas-phase products increase as well; isobutylene also increases. This is my personal understanding, and I look forward to replies from experts
As a supplementary point, I’m not sure whether your catalysts contain ZSM-5 selective molecular sieves; if so, there is also the factor of catalyst pores to consider.