MATHEMATICAL MODELING AND COMPARISON OF TWO RISER REACTORS IN CONVENTIONAL FCCU AND FCCU ASSISTED BY MICROWAVE ENERGY.

A one dimensional dynamic model for a riser reactor in a fluidized bed catalytic cracking unit (FCCU) for gasoil feed has been developed in two distinct conditions, one for industrial FCCU and another for FCCU using various frequencies of microwave energy spaced at the height of the riser reactor (FCCU-MW). In addition, in order to increase the accuracy of component and bulk diffusion, instantaneous and overall fractional yield is used in a heuristic manner. Furthermore, the effect of various input temperatures on gasoline yield with FCCU-MW has been studied. The results of the convectional FCCU simulation show great compatibility with the plant data in hand. Comparison of the two models shows that microwave energy gives better results in terms of gasoline yield. Also it has been shown that the increase of feed temperature leads to the increase of gas oil conversion and especially gasoline yield. [ABSTRACT FROM AUTHOR]