From our previous discussion, it is clear that the locations of the two branch points BP1 and BP2 are of considerable
practical importance. Firstly, the reactor must be operated above the residence time at which the washout solution loses
stability (BP1). Secondly, although the system performance always increases with residence time, the improvement in
reactor performance with residence time is much more marginal after the second branch point (BP2). If the reactor
performance is to be significantly improved over that obtained at the second branch point then either very large residence
times or a different reactor configuration, such as a cascade, must be used