This study
presents the dynamic model for an industrial Universal Oil Product (UOP) fluid
catalytic cracking unit on basis of mass and energy balance and the transfer
functions are found.
The riser and
regenerator are simulated by using Matlab/Simulink software. The dynamic
behaviour of the process is carried out by measuring the temperature response of the
riser and regenerator to step change in gas oil flow rate, gas
oil temperature, catalyst flow rate, air flow rate and air temperature.
The simulator is
validated by comparing the steady-state behaviour of the system with those in
the literature and plant data and the results are found to be in good
agreement. The results of simulation show that the process is strongly
influenced by the catalyst flow rate, and any increase in the amount of coke on
the catalyst and regenerator temperature would be compensated by a larger rate
of consumption of the oxygen.
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