from first principles PP-I-1

PP-III-96Mathematical Modelling of Oxygen Regeneration of CatalystsSayfullina L.V. 1 , Gubaydullin I.M. 2 , Enikeev M.R. 11 Bashkir State University, Ufa, Russia2 Institute of Petrochemistry and Catalysis RAS, Ufa, Russialeniza19@mail.ruCatalytic cracking plays a key role in the refining industry. Catalytic cracking breaks complexhydrocarbons into simpler molecules in order to increase the quality and quantity of lighter,more desirable products and decrease the amount of residuals. In this work investigations of amoving-bed and fixed-bed reactor were carried out. For the optimum control of this processit’s necessary to work out a mathematical model and to investigate the effect of possiblechanges in the operation by means of calculations with the model on high-parallel computers.In [1] it was shown that a mathematical model describing the industrial regeneration of silicaaluminacatalyst in a moving bed can be deprived by writing the equations that represent themass balances of coke and oxygen, and the beat balance for an infinitely thin regenerator slab.Fixed bed catalyst regeneration in an adiabatic reactor may be described by a system ofdifferential equations representing the material and thermal balances with respect to oxygen,coke and temperature with boundary condition.Solution for optimization of process of oxygen regeneration was derived by using geneticalgorithm. The program that allows calculating the temperature and coke content variationwas created. It has the user-friendly input/output interface for investigation of consumption,concentration and temperature of oxygen-containing gas influence. Utilizing the mathematicalmodel proposed, we have found the optimum control over fixed-bed catalyst regeneration bygenetic algorithm. Future work is also needs to extend the parallel genetic algorithm for amoving bed reactor by implementing the same methodology.References:[1] Zhorov Yu.M. : Modeling of the physical and chemical processes of oil refining andpetrochemistry. Moscow, «Chemistry » 1978.255