Hc. Liang et Ks. Udell, Experimental and theoretical investigation of vaporization of liquid hydrocarbon mixtures in water-wetted porous media, WATER RES R, 35(3), 1999, pp. 635-649
The evaporation of a separate-phase, multicomponent liquid hydrocarbon mixt
ure in water-wetted porous media was studied to determine the role of water
in the vaporization of contaminants during soil venting. Experiments were
conducted in one-dimensional (1-D) water-wetted sand columns containing liq
uid hydrocarbons under both through-flow and bypass-flow configurations. On
e-dimensional through-flow and bypass-flow multicomponent drying models wer
e applied to predict the removal rates of the hydrocarbons, as well as the
effluent gas concentrations, liquid component concentration distribution in
the sand, and the position of the evaporation front. Theoretical predictio
ns agreed well with experimental data when water was present in residual am
ounts. Experimental findings show that the presence of water does not influ
ence the hydrocarbon vaporization rates in both through-flow and bypass-flo
w drying cases, although the bypass-flow theory predicts lower effluence in
a system with high water content.