Internal mass transfer during isothermal drying of a porous solid containing multicomponent liquid mixture
2005 (English)In: Drying Technology, ISSN 0737-3937, E-ISSN 1532-2300, Vol. 23, no 9-11, 1939-1951 p.Article in journal (Refereed) Published
Internal mass transfer in a porous solid partially saturated with multicomponent liquids has been experimentally and theoretically studied. Isothermal drying experiments were performed using a jacketed wind tunnel where the transient composition profiles and total liquid content of a cylindrical sample were determined. Sand samples wetted with the ternary liquid mixtures watermethanol-ethanol and 2-propanol-methanol-ethanol were dried at two different initial compositions and temperatures. A mathematical model including mass transfer by capillary movement of the liquid and interactive diffusion in both gas and liquid phase was developed. To simulate the capillary movement of liquid mixtures, parameters experimentally determined for single liquids where weighed according to liquid composition. A fairly good agreement between theoretical and experimental liquid composition profiles was obtained provided that axial dispersion is included in the model.
Place, publisher, year, edition, pages
Taylor & Francis, 2005. Vol. 23, no 9-11, 1939-1951 p.
liquid transport, hydraulic conductivity, capillary, diffusion coefficients
IdentifiersURN: urn:nbn:se:kth:diva-28889DOI: 10.1080/07373930500210390ISI: 000232422200014ScopusID: 2-s2.0-27144524913OAI: oai:DiVA.org:kth-28889DiVA: diva2:390472
QC 201101242011-01-212011-01-212016-07-21Bibliographically approved