RTD – Direct Coupled Cyclones

Lummus Technology’s Reaction Termination Device (RTD), incorporating our proprietary Direct-Coupled Cyclone technology, is used in both grassroots and revamp applications. The RTD is critical in preserving the yields of gasoline and light olefins by terminating the reactions at the end of the reactor riser.

• Primary cyclone operates at a lower pressure than the containment vessel, causing the net flow of gases to be upwards and blowdown of product vapors downwards to be negligible
• Nearly 100% recovery of the product vapors at the end of the riser
• Post-riser residence time is minimized to eliminate non-selective cracking and hydrogen transfer reactions that degrade valuable products
• Significant reduction in delta coke and dry gas yield
• High liquid and light olefins yields
• Decreased hydrocarbon loading in the spent catalyst stripper