S.Gita Sharafi ebgha - Department of chemical engineering ,university of sistan & baluchestan, Zahedan , I.R. IRAN
Rahbar Rahimi - Department of chemical engineering ,university of sistan & baluchestan, Zahedan , I.R. IRAN

Pressure drop across a packed column in pilot-scale calculated using the Ergun equation thatwas developed using experimental data from mono-sized, smooth, non-porous, Raschig particles.New values of Ergun equation constants (33.5 and 1.6) which are applicable to this kind of packing,were found to better approximate pressure drop compared to those used in the original form of theErgun equation (150 and 1.75)

Pressure drop, packed tower, random packing, Ergun equation constants