Optimizing FCC regenerator can minimize catalyst losses

Proper regenerator bed level and cyclone operation are important to ensure minimum catalyst losses from FCC units. Monitoring the regenerator level in relationship to the cyclone dipleg valves and transport disengaging height (TDH) is key to curtailing catalyst losses. Absolute catalyst level inside the dipleg should be periodically evaluated to ensure losses are minimized, particularly in units that operate at high regenerator superficial velocities. Click here to enlarge imageFCC unit charge rates have risen steadily in the US since 1992. US Energy Information Administration data (Fig. 1), illustrate that average FCC charge rates have climbed to 5.2 million b/d in 2000 from 4.8 million...

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