HEAT TRANSPORT IN A WALL HEATED TUBULAR PACKED BED REACTOR AT ELEVATED PRESSURES AND TEMPERATURES

Abstract

Abstract At different flow rates, pressures and temperature levels heat transfer parameters according to both one- and two-dimensional pseudo-homogeneous model without axial dispersion were determined from steady state temperature measurements in a wall heated tube packed with an industrial ring shaped catalyst. For the effective radial conductivity the following correlation was obtained The wall heat transfer coefficient was correlated as Both Re and Nu are based on particle size. The temperature dependence of the parameters investigated with wall temperatures between 100 to 250°C, is well characterised in these correlations by the temperature influence on the kinematic viscosity in Re and the gas conductivity in Nu. A temperature dependence of limit of the Bodenstein number pguCpdp/ϵλeff,r at high Reynolds number, was observed experimentally. The overall heat transfer coefficient U was at constant gas flow rate found to increase with temperature. The usual lump relation in combination with the experimen...