Date of Award
Master of Science in Chemical Engineering - (M.S.)
Chemical Engineering and Chemistry
John E. McCormick
Edward Charles Roche, Jr.
This thesis presents a new equation for predicting catalyst utilization with continuous replacement in multistage continuous reactors from batch reactor data.
An equation is derived from experimental data for a. no-replacement system which predicts catalyst activity as a function of time. The assumption of constant inventory, constant replacement rate and perfect mixing permit the calculation of catalyst age distribution. By combining age distribution with a measure of catalyst productivity, as determined from activity as a function of time, an equation for catalyst utilization was derived. The case used to prepare this equation was where the activity decline curve appears as a straight line on log-log paper.
The resulting equation which describes catalyst utilization is as follows:
Catalyst utilization = ((n-b)Γn-b)/Γ(n))/r1-b
where: n is the number of reactors in series,
Γis the gamma function, and
b is the slope of the catalyst activity curve on a log-log plot.
Feinberg, Norman M., "Predictions of catalyst utilization with continuous replacement in multistage continuous reactors from batch reactor data" (1972). Theses. 2039.