Maximum-Mixedness Reactor Model MMM

The total flow from the reactor inlet (t = te - oo) to a point at t is, from equation 20.4-1, 

An alternative (and much simpler) way of solving 20.4-6 is to covert it from a boundary- value problem to an initial-value problem, which may then be numerically integrated. 

This may be accomplished by recognizing that E(t) 0 for times much longer than the mean residence time. Practically speaking, this usually occurs whenever t is 5 to 10 times the mean residence time. Hence, for an irreversible reaction, cA(t = 10F) = 0, and for a reversible reaction, cA(t = 101) = cAeq. Either of these initial conditions consequently represents cA at the inlet of the reactor, and permits the solution of 20.4-6. 

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