Abstract: Experiments on radial dispersion of a gas stream in three different types of packings were carried out in φ200- and φ287- mm perspex columns with CO2 as a tracer. The packing used were corrugated plate with 4.5- or 6.3- type extruded holes, 15-mm Raschig rings, and 25-mm cascade rings. Experimental results indicated that the corrugated plate packing has an excellent radial dispersion behavior. The value of Peclet number Per depends on the height and diameter of the packing element, inclination angle of corrugation and the Reynolds number Re. Peclet number increases with increasing Re at low Re, but approaches a constant value as Re>800.