Abstract: In order to study the coke burning on light hydrocarbon aromatization catalyst in moving bed, a catalyst coke burning model with two stages of oxygen injection and two stages of temperature control was developed. In the model, the catalyst bed is divided into several sections, and different conditions are adopted in each section. The catalyst bed was divided into several annular micro-cells which satisfied the requirement of simulation precision. Based on the experimental macro-kinetic equation of the commercial light hydrocarbon aromatization catalyst, the content and temperature distribution of carbon, hydrogen and oxygen in the whole bed were obtained based on the mass balance of carbon and hydrogen in the catalyst cell and the balance of combustion and heat transfer in the cell. The measured values in industry were in good agreement with the predicted values of the model, which provided technical support for the further popularization and application of the mobile bed aromatization technology.

Key words: aromatization of light hydrocarbons, catalysts, regeneration, coke burning, dynamics, mathematic model