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AM-95-38 Post Riser Quench Improves FCC Unit Profitability

George P. Quinn, Amoco Petroleum Products, Michael A. Silverman, Stone & Webster Engineering Corp.

Format:
Electronic (digital download/no shipping)

Associate Member, International Member, Petrochemical Member, Refining Member - $0.00
Government, NonMember - $35.00

Description:

The evolution of the FCC process over the last 50 years has been toward shorter contact time and more selective catalytic cracking reactions. Vertical FCC riser reactors followed by rapid separation of the catalyst from the cracked product advanced this technology to it’s current state. However, in many units, significant post riser cracking still occurs in the dilute phase of the FCC reactor. These reactions, in the absence of catalyst, are primarily nonselective thermal cracking reactions. As such, these thermal reactions degrade the products from the highly selective catalytic reactions that occurred in the riser. To retain the selective products from the catalytic reactions, Amoco has developed and implemented technology to quench the dilute phase of the FCC reactor. By quenching the dilute phase of the FCC reactor, the temperature is reduced and the thermal reactions are essentially stopped. The yield impact of quenching the dilute phase is significant, with fuel gas production reduced by up to 1 wt% on feed. In addition, FCC gasoline increases by about 1 ~01% because the thermal reactions which destroy the gasoline have been dramatically reduced. Finally, the butadienes and pentadienes that result from thermal reactions are reduced by about 50%.

Product Details:

Product ID: AM-95-38
Publication Year: 1995