Modelling fluidized catalytic cracking unit stripper efficiency

Abstract

This paper presents our modelling of a FCCU stripper, following our earlier research. This model can measure stripper efficiency against the most important variables: pressure, temperature, residence time and steam flow. Few models in the literature model the stripper and usually they do against only one variable. Nevertheless, there is general agreement on the importance of the stripper in the overall process, and the fact that there are few models maybe it is due to the difficulty to obtain a comprehensive model. On the other hand, the proposed model does use all the variables of the stripper, calculating efficiency on the basis of steam flow, pressure, residence time and temperature. The correctness of the model is then analysed, and we examine several possible scenarios, like decreasing the steam flow, which is achieved by increasing the temperature in the stripper.