Experimental and theoretical investigation of vaporization of liquid hydrocarbon mixtures in water-wetted porous media

Citation
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
Citations number
27
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology,"Civil Engineering
Journal title
WATER RESOURCES RESEARCH
ISSN journal
0043-1397 → ACNP
Volume
35
Issue
3
Year of publication
1999
Pages
635 - 649
Database
ISI
SICI code
0043-1397(199903)35:3<635:EATIOV>2.0.ZU;2-S
Abstract
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.