Catalytic cracking is the conversion of high boiling point petroleum fractions to gasoline…

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Catalytic cracking is the conversion of high boiling point petroleum fractions to gasoline and other valuable products in the presence of catalyst. The process gained more interest due to the increasing demand for gasoline compared to diesel and heavy fuels.

Modeling of the reactor can be an important tool in the design and optimization of the cracking process to be more profitable and give higher yield. Modeling of the catalytic cracking reactor is complicated due to the interactions of many factors such as solid and gas flow, turbulence and kinetics of cracking reactions. Different kinetic models have been suggested in the literature for catalytic cracking such as lumped reactions model. Modeling of catalytic cracking process has been traditionally carried out by lumping method in which chemical species with similar behavior are grouped together like gasoline, kerosene …….etc. Each lump contains a wide range of molecular weight molecules. Lumping makes kinetics and modeling an easier task.

The objectives of this term project is to use the four lump mathematical model to simulate the performance of FCC batch reactor for cracking of gas oil. The model will include the effects of diffusion and intrinsic catalytic reactivity decay. The model use modified Thiele modulus and effectiveness factor based on Zeolite crystals properties.

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