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Feed Nozzle Effects on Yields and Operation

Presented By

Miray Genc - TUPRAS


It is really important to select the right feed nozzle and nozzle tip in FCC operation. Changing the nozzle type can result in high gasoline yields up to 1-2 wt.% by decreasing the delta coke and increasing cat to oil ratios. Droplet size, droplet distribution, spray pattern, pressure drop across the nozzle, atomisation stages, turndown ratios and residence time all have an affect on the feed nozzle efficiency. Feed nozzles have to be operated between lower and upper velocity boundaries so as not to cause any increase in regenerator temperatures, dry gas by low velocities or feed distributor erosion, catalyst attrition by high velocities. Nozzle tip material also plays an important role since this is the part of the nozzle that is susceptible to catalyst particles more than the other parts of the nozzle. Nozzle tip has to be resistant both to erosion and thermal expansions to last longer during FCC operation.

Miray Genç, TUPRASMiray Genc joined TUPRAS in March 2007 and has worked in TUPRAS refineries for the past 11 years. She is working as FCC process superintendent. Before that, she worked for Turkish Council of R&D as a Process Engineer on nanocomposite materials.
She has been responsible for FCC, Coker, Hydroprocessing, SMR, SRU, DEA, Merox, Prime G and SHU Units as process superintendent for the past 11 years. Currently, at TUPRAS her role covers only FCC Units. Benchmarking the unit operations, catalyst and additive selections, equipment design, leading revamp projects and investments, test runs, S/U and S/Ds are all within her scope of work.


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