Document Type


Date of Award


Degree Name

Master of Science in Chemical Engineering - (M.S.)


Chemical Engineering and Chemistry

First Advisor

Deran Hanesian

Second Advisor

Ching-Rong Huang

Third Advisor

Angelo J. Perna


Feedforward control, feedback control, and combined feedforward-feedback control were studied on an analog computer to evaluate their effectiveness in controlling a fluidized-bed reactor used for the decomposition of cumene. Proportional, proportional-integral, proportional-derivative, and proportional-integral-derivative modes of control were investigated. Step changes in set-point and load were used as disturbances. The Ziegler-Nichols method and the process reaction curve method of Cohen and Coon were compared in determining values of KC, Ti, and Td which gave optimum control of the fluidized-bed reactor.

Control equation were obtained from the block diagrams of the systems and solved on an EAI TR-20 Analog Computer.

It was found that tighter control of the fluidized-bed reactor was maintained when feedforward control was combined with feedback control for all modes of control studied. The Cohen and Coon reaction curve method and the Ziegler-Nichols method resulted in values of Kc, Ti, and Td which gave equally good control.



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