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How do you estimate the decrease in yields resulting from an increase in pressure in the fractionator due to fouling in the head coolers?
niranjan puttaraju, reliance industries ltd, firstname.lastname@example.org
Yields are mainly depend on operating conditions coke drum pressure, coke drum top temperature/COT and recycle ratio. You can estimate change in yield by keeping all other operating parameters and feed properties remain same. Also you can check rule of thumbs.
John Bettinger, Qualex Engineering, email@example.com
The overhead cooler fouling will back up pressure through to the coke drums. There are published resources that indicate that 8 psi reduction in coke drum pressure reduces coke yield by 1 wt% on feed and increases liquid yield by 1.3 vol% on feed. I assume a pressure increase would have the inverse affect.
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