A PREDICTIVE MODEL FOR ULTRAFILTRATION: COMBINATION OF OSMOTIC PRESSURE MODEL AND IRREVERSIBLE THERMODYNAMICS

Autor:	Sandeep K. Karode
Rok vydání:	2001
Předmět:	State model Membrane Chemistry Process Chemistry and Technology General Chemical Engineering Permeate flux Thermodynamics Osmotic pressure Filtration and Separation General Chemistry Permeation
Zdroj:	Separation Science and Technology. 36:2659-2676
ISSN:	1520-5754 0149-6395
Popis:	An unsteady state model for ultrafiltration that describes transport within the pores of the ultrafiltration membrane is presented. The new, improved model combines the osmotic pressure model for transport in the polarization layer and the irreversible thermodynamics approach. The model is capable of simultaneously predicting 1) the permeate flux, 2) the permeate concentration, and 3) the concentration at the membrane feed surface when all the transport parameters are fixed. The model data are comparable to the experimental data cited in the literature. Model simulations conducted by varying 1 parameter while the others are kept constant show that the entire range of observed transmissions is a function of permeate flux. For certain parameter values, the model predicts observed transmission greater than unity. Hence, in principle, an ultrafiltration system in which the product of interest is concentrated in the permeate stream can be designed. The model also correctly predicts the experimental observation...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b95021a5ced1d0b7f981b122418c12d7 https://doi.org/10.1081/ss-100107218 Zobrazit plný text záznamu