Mass Transfer Flux at Solid-Liquid Contacting Interface
- Autores: J. Shi, M. Le Maguer
- Localización: Food science and technology international = Ciencia y tecnología de alimentos internacional, ISSN-e 1532-1738, ISSN 1082-0132, Vol. 9, Nº 3, 2003 (Ejemplar dedicado a: International Conference Iberdesh 2002: Process, Structure and Functionality Editorial), págs. 193-199
- Idioma: inglés
- Títulos paralelos:
- Flujo de transferencia de masa en la interfaz de contacto sólido-líquido
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Resumen
When cellular materials are immersed in a solution of high concentration, the mass transfer is considered a multi-component transport process in which simultaneous and countercurrent flows occur in the biological tissue. The mass transfer process of each component in the solid-liquid system is affected not only by operational parameters, but also by the presence of other components. The main driving force for the mass transfer phenomena is attributed to the concentration gradient between external and internal solid material, and the interaction among fluxes and tissue matrix. Matrix deformation and tissue shrinkage are important characteristics influencing mass transfer. The coupled mass transfer fluxes across the interface in an isothermal solid-liquid system were analysed by means of a film model as a function of the concentration gradients, based on the generalised multi-component mass transfer theories. Several possible situations of cell structure changes are discussed, and the effect of structural shrinkage on mass transfer is modelled in this study. The mass transfer model and parameters proposed in the present study is applicable to the unit operation such as osmotic treatment of cellular porous biomaterial. (A)
