Formation and dynamics of a hot zone in radial flow reactor

Abstract

An infrared camera was used to study the formation and dynamics of hot zones

Dynamic Simulation of Mixing-Limited Symmetric and Asymmetric Patterns in Homogeneous Autocatalytic Reactors

“…Using a regularized low dimensional model, our previous works [1, 2, 3] mainly focused on the symmetric patterns that develop due to the difference in mixing and reaction time scales, while our present paper simulates the formation of asymmetric patterns, which have been observed in experimental studies [4]. We find that higher eigen modes of initial perturbation lead to patterns that are more stable and more asymmetric than those formed from lower modes.…”

“…The formation of patterned states may often reduce the product yield by deactivation of the catalyst or reactor runaway. Using a regularized low dimensional model, our previous works [1,2,3] focused on the symmetric patterns that develop due to the difference in mixing and reaction time scales, while our present paper simulates the formation of asymmetric patterns, typically observed in experimental studies [4].…”

Dynamics of hot zones on top of packed-bed reactors

“…Our previous experiments with a shallow radial flow reactor (Marwaha et al, 2001;Marwaha and Luss, 2002) revealed breathing motions, while experiments in a shallow packed bed (Marwaha and Luss, 2003) showed that in addition a splitting and recombination of the hot zone may occur. The current experiments, using smaller (2-3 mm) diameter pellets, revealed a much richer and complex dynamics than when using larger (3-4 mm) diameter pellets.…”

Linear stability analysis of high- and low-dimensional models for describing mixing-limited pattern formation in homogeneous autocatalytic reactors

“…[9,10]. Such a condition can often decrease the yield of the desired product, deactivate the catalyst, initiate highly exothermic undesirable reactions or induce safety hazards by decreasing the reactor strength.…”