In the paper

the two-dimensional temperature profiles of spherical α -Al 2O 3

cylindrical methanol synthesis catalyst

and ring pellet ethylene oxide synthesis catalyst in packed bed with air flow are obtained by using a wall-cooled fix-bed experimental equipment

in which experimental temperature can be measured in both axial and radial directions at the same time. The radial effective conductivity and wall heat transfer coefficient are calculated by using a two-dimensional psuedo-homogeneous heat transfer model.With reference to different equivalent diameters for ring pellet

the equivalent specific surface diameter is determined by calculating both the inside and outside surfaces of ring pellet. The heat transfer parameters are correlated as a function of Reynolds number Re p.