Abstract
Rates of mass and heat transfer (by analogy) at the surface of a helical coil imbedded in a fixed bed of inert cylindrical packing were measured under upward two-phase (gas-liquid) flow by the electrochemical technique. The effects of geometrical and hydrodynamic parameters were considered. The performance of cylindrical packing was compared with that of Raschig rings and spheres. The analogy between heat and mass transfer was discussed and the importance of the present study for the design and operation of heterogeneous reactors that need rapid cooling in case of highly exothermic reactions was highlighted.