Modeling the oxidative regeneration process taking into account the effect of water vapor

Doklady Bashkirskogo Universiteta. 2020. Volume 5. No. 5. pp. 311-321.

DOI: https://doi.org/10.33184/dokbsu-2020.5.1

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The article is devoted to the study and modeling of the process of oxidative regeneration of coked catalysts for catalytic cracking. It is known that during heterogeneous catalytic processes, the activity of the catalysts used decreases due to the formation of coke deposits on their active surface. Therefore, the implementation of regeneration becomes an important stage that solves the problem of deactivation of catalysts. The regeneration stage is characterized by the interaction of carbon with oxygen, as well as water vapor under the influence of high temperatures. However, it should be remembered that coke burning does not start immediately after oxygen is supplied. First, an unstable intermediate compound of carbon with oxygen accumulates. After the induction period, coke combustion occurs, accompanied by the formation of carbon monoxide and carbon dioxide. During the study, the initial concentrations of oxygen and water vapor were varied and their effect on the rate of the process was taken into account. It is very important that any industrial process does not harm the ecology of the environment, therefore it is important to monitor the gases emitted during the process. Analysis of the data shows that when water is added during regeneration, the rate of carbon combustion will be faster than when blowing with oxygen. The amount of carbon monoxide emitted when water is added is less.