Modern design, troubleshooting tools create a successful FCC revamp

Based on OMV AG's need for increased conversion and selectivity for propylene production, UOP LLC revamped its existing stacked FCC unit to include Optimix feed distributors, vortex separation system (VSS) riser disengaging, and a modern reactor stripper design.New reactor internals increased the feed rate, but the design retained the existing reactor shell to maintain a constant structure and foundation load. Internal clearances were closer than a typical new reactor system. The existing stripper also received new internals.Postrevamp operation exceeded the expectations for propylene yield. Catalyst containment in the reactor, however, was not as good as expected. OMV and UOP develop...

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