首页|The role of crude oil selection in enhancing the profitability of a local refinery with lube hydro-processing capacity
The role of crude oil selection in enhancing the profitability of a local refinery with lube hydro-processing capacity
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To increase the product value out of a crude barrel, some refineries produce Group III Lube Base Oil (LBO) through catalytic hydroprocessing, in addition to the conventional fuels slate, such as gasoline, diesel, kerosene etc. This study proposes an overall optimization methodology for complex oil refineries with a lube base oil processing capability. The optimization problem of a refinery with fuels and lubes portfolios is considered a challenge, since there are several tradeoffs in terms of crude selection and operational conditions. These tradeoffs are addressed by employing a crude classification model based on the Viscosity Index (VI) of the Hydrocracking Unit (HCU) feed, and by taking into account the change in VI and yields besides the other conventional bulk properties through the refinery units, to select the optimal crude types that maximize the products value and hence overall refinery margin. Using the VI model was found critical to ensure that the LBO VI is within the specification and can save the refinery up to US$1 million per day. When the hydrocracking conversion decreases from 80% to 75%, the volume of paraffinic crudes increases by 3% and 16% for VI specification at 120 and 125, respectively.
RefineryOptimizationCrude selectionLube base oilViscosity indexHydrodimerization
Lujayn Alsayoof、Mohamed Bin Shams
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Department of Chemical Engineering, University of Bahrain, P.O. Box 32038, Isa Town, Kingdom of Bahrain
NSTL
