Experimental measurements on liquid distribution in a trickle-bed reac
tor are presented,, as well as the effect of liquid and gas flow on ra
dial liquid distribution. The influence of liquid density and surface
tension was also investigated. The model for liquid distribution propo
sed by Herskowitz and Smith in 1978 was modified to incorporate the ef
fect of particle orientation. Model parameters are correlated with liq
uid and gas flow rates, as well as liquid surface tension.