Catalytic Hydrocracking Case Study

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.1.3 Catalytic hydrocracking Hydrocracking is hydrogen addition process. With the presence of hydrogen and a catalyst, the process changes high molecular weight feed stocks, gas oil from the ADU/VDU, the FCC, and the delayed coking, to lower molecular weight products, gasoline, jet fuels, and diesel. The process consists mainly of a reactor, hydrogen separator to recycle the unreacted hydrogen, fractionator, and heating and cooling system. The products depend on the hydrogen severity, mode of operation, such as naphtha maximum gasoline mode, maximum ATK mode (jet fuel) or maximum diesel fuel. Likewise, the type of feed heavily affects the products like gas oil from ADU/VDU can produce Naphtha, jet fuel, and/or diesel. The hydrogen presences…show more content…
The following are the cost estimated and operation cost: Table 17: The investment cost and operation cost data for catalytic hydrocracking Investment cost estimated: Cost (1000 (scf hydrogen consumption )/(bbl feed))=4.86*F+28.3 Cost (2000 (scf hydrogen consumption )/(bbl feed))=6.58*F+36.7 Cost (3000 (scf hydrogen consumption )/(bbl feed))=7.67*F+46.27 Linear interpolation from three points is used to calculate at a given point of hydrogen consumption Costs included: 1. Stabilization, Fractionation system, Complete reaction system 2. Hydrogen facilities, sulfide removal from hydrogen recycle and hydrogen recycle compressors 3. Heat exchange and cooler use to cool products 4. A central control system Operation cost data (per bbl…show more content…
The unit converts heavy products into more valuable products such as gasoline and lighter products. However, heavy carbon product (catalyst coke) is produced during the cracking. The process mainly consists of a reactor, fractionator and catalyst regeneration system. The fluid catalytic cracking, catalyst is fluid and circulated around, is the most process used in refinery complex. The correlations for the yield obtained from the regression of plant data using a zeolite catalyst (Fahim, Alsahhaf , & Elkilani , 2010). The following are the correlations: Table 18: FCC products correlations Coke wt%= 0.05356 * CONV – 0.18598 * API + 5.966975 LCO LV%= 0.0047 * CONV2 – 0.8564 * CONV + 53.576 Gases wt%= 0.0552 * CONV + 0.597 Gasoline LV%= 0.7754 * CONV –

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