Abstract
Static bifurcation in a FCC unit is a problem that arises whenever studying the control of a FCC unit. The origin of this behavior is usually due to the exothermicity of the catalyst regeneration reactions and to important phenomena of backmixing in the regenerator. For this reason the geometrical and operational design of the regenerator unit plays an important role in the overall performance and dynamic stability of FCCs. Prior work has focused on model and control problems of different operating FCC units. However, none of these studies have considered a FCC unit with high efficiency regenerator. This paper presents an analysis of the static bifurcation behavior of an UP FCC unit with high efficiency regenerator. The results show that the high efficiency regenerator presents static bifurcation exhibiting multiple steady states, depending on the operating conditions.
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