Abstract
The kinetics of coke combustion on SAPO-34 molecular sieve in the methanol to olefins( MTO) process is studied based on the industrial data of a MTO plant. Intrinsic and empirical models are founded and tested by industrial data. Due to the complexity of industrial regenerator,the fitting degree of the models to practical data is relatively low. The problems that occur during the industrialization of MTO process are discussed and the corresponding solutions are proposed. Catalytic properties of regenerated catalyst are tested by fixed fluidized bed. The results show that the coke retained in the regenerated catalyst is helpful to shorten or distinguish the induce period of MTO reaction,which provides guidelines to control coke combustion density and average coke content in MTO reactor.
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