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Reply To: FCCU Severity

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Paul R Orlowski

Michael Edwards:
No offense to anyone. Without any information about the current limits on unit, the catalyst (or additives, if used), the goals (max olefins, max conversion, max gasoline and/or octane) this is nonsense. That aside, if they are at wet gas limit, of course reduce RTT (RxT), and allow either more conversion or more feed (the latter being generally more profit). If at coke limit, push up feed preheat to allow more feed rate. Rule of thumb, more feed is more money. If at high RTT because gasoline octane, use additives and reduce RxT. Simple steps. But without details of the situation, rest is pure BS.

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