Dependence of cooled reverse-flow reactor dynamics on reactor model

Extensive simulations indicate that in most but not all cases the single- a nd two-phase models predict similar dynamic behavior of a reverse-flow reac tor; when catalyst pellet multiplicity does nor occur at any point in the r eactor. Differences in the predictions are found in some cases close to the dynamic bifurcation loci of a cooled RFR, or in others when the qualitativ e dynamic behavior is very sensitive to the value of the parameters, such a s close to a transition to chaotic behavior. The two models can lend to rat her different predictions of the dynamic features when there are large diff erences between the feed and coolant temperatures.