Flow-rate effects in flow-reversal reactors: experiments, simulations and approximations

Analysis of design sensitivity of flow-reversal reactors: Simulations, approximations and oxidation experiments

“…The experimental reactor configuration employed in this study is detailed in Ben-Tullilah et al (2003). The essential information is repeated below.…”

“…Yet, decreasing the flow rate or the adiabatic temperature rise (i.e., the feed concentration) will lead to declining temperature and an extinction as well. It is important therefore to find and predict the domain where the flow-reversal reactor can be operated and that was the purpose of a recent contribution (Ben-Tullilah et al, 2003) in which we compared experimental observations of flow-rate effects, during ethylene oxidation on Pt/Al 2 O 3 , with simulations of one-dimensional models of this reactor and with approximate solutions based on instantaneous or very fast reactions. We suggested several approximations that capitalize on this property and applied them to the structure of our reactor, in which the catalytic bed is imbedded between two inert zones.…”

Comparing flow‐reversal and inner recirculation reactors: Experiments and simulations

“…results in Figure 11 a , both showing a steep front at the entrance to the reactor, but the agreement could be improved by better matching the various heat-transfer coefficients of Ž . the problem see also Ben-Tullilah et al, 2003 . While it is evident that the heat-transfer coefficients should be higher than those employed in the simulations, initial attempts to use lower values led to the extinction of the whole reactor.…”

Homogeneity of Continuum Model of an Unsteady State Fixed Bed Reactor for Lean CH4 Oxidation

“…Both ways are important for observing the dynamic behavior of the RFR. Various mathematical models have been proposed to predict the dynamic behavior of the RFR, from simple models (pseudo-homogeneous one-dimensional models) [3,4] to complex models (heterogeneous one-dimensional models) [5,6].…”