MASS AND HEAT TRANSFER EFFECTS IN CATALYTIC MONOLITH REACTORS

摘要: Abstract Numerical simulations of catalytic oxidation in monolith reactors are performed order to develop criteria for mass transfer limitation. A two-dimensional finite-element simulator previously developed is used examine reported studies propane and carbon monoxide combustion excess oxygen. The Sherwood Nusselt numbers computed from the simulation results compared derived experimentally. much higher than which have been literature experimental work. Simulation agree well with obtained analytically experimentally non-reacting flow circular tubes, also other correlations reacting flows based on numerical reason discrepancy between simulated explained. For first-order reactions, a dimensionless reaction number proposed, may be evaluate whether or not rate controlled. CO, multiple steady states possible variation under transient conditions discussed. influence diffusion real washcoat examined. In square channels dimension 1 mm, low effectiveness factors temperatures above 700 K, catalyst utilised. It shown that care needs taken extension relatively low-temperature kinetic data elevated encountered operating conditions.