Modeling of oxidative regeneration of a solid cylindrical catalyst grain

TitleModeling of oxidative regeneration of a solid cylindrical catalyst grain
AuthorsO. S. Yazovtseva1, I. M. Gubaydullin2, A. F. Kokulov1, A. A. Makarova1, E. E. Peskova1
1National Research Mordovia State University
2Institute of Petrochemistry and Catalysis of the Russian Academy of Sciences
AnnotationThe article is devoted to the mathematical model of oxidative regeneration of a cylindrical catalyst grain. The three-dimensional model is reduced to the problem in an axisymmetric formulation. The assumptions of grain uniformity and coke distribution over it, the direction of the Stefan flow along the cylindrical radius are accepted. The model is described by a system of partial differential equations with initial boundary conditions corresponding to heat and mass transfer at grain boundaries. A large difference in the rates of the processes accompanying oxidative regeneration leads to computational difficulties for the numerical solution of the system. The problems that arise are solved using splitting by physical processes. A computational experiment was carried out for two types of catalyst grains – «tablet», on the right – «solid cylinder». The simulation results are visualized.
Keywordsoxidative regeneration, chemical kinetics, thermal conductivity equation, diffusion equation
CitationYazovtseva O. S., Gubaydullin I. M., Kokulov A. F., Makarova A. A., Peskova E. E. ''Modeling of oxidative regeneration of a solid cylindrical catalyst grain'' [Electronic resource]. Proceedings of the International Scientific Youth School-Seminar "Mathematical Modeling, Numerical Methods and Software complexes" named after E.V. Voskresensky (Saransk, July 14-18, 2022). Saransk: SVMO Publ, 2022. - pp. 225-230. Available at: https://conf.svmo.ru/files/2022/papers/paper36.pdf. - Date of access: 30.11.2022.