Measurements by holographic interferometry of concentration profiles in dead-end ultrafiltration of polyethylene glycol solutions
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Título: | Measurements by holographic interferometry of concentration profiles in dead-end ultrafiltration of polyethylene glycol solutions |
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Autor/es: | Fernández Sempere, Julio | Ruiz Beviá, Francisco | Salcedo Díaz, Raquel |
Grupo/s de investigación o GITE: | Transferencia de Materia - Interferometría Holográfica |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Ingeniería Química |
Palabras clave: | Ultrafiltration | Holographic interferometry | Concentration profiles | Polyethylene glycol | Concentration polarization | Modelling |
Área/s de conocimiento: | Ingeniería Química |
Fecha de publicación: | 1-feb-2004 |
Editor: | Elsevier |
Cita bibliográfica: | FERNÁNDEZ SEMPERE, Julio; RUIZ BEVIÁ, Francisco; SALCEDO DÍAZ, Raquel. “Measurements by holographic interferometry of concentration profiles in dead-end ultrafiltration of polyethylene glycol solutions”. Journal of Membrane Science. Vol. 229, Issues 1-2 (1 Febr. 2004). ISSN 0376-7388, pp. 187-197 |
Resumen: | Anoptical method (microscopic holographic interferometry) has been used to visualize concentration changes in the vicinity of the membrane surface while a polyethylene glycol 2000 (PEG) solution was ultrafiltered with a cellulose acetate membrane. This interferometric technique is based on the fact that changes of refractive index, which are associated to changes of concentration, can be visualized as interference fringes. Interferograms obtained in different experimental conditions (initial PEG 2000 concentration range from 1 to 10 kg/m3 and transmembrane pressure range from 1 × 105 to 3 × 105 Pa) as well as permeate flux are presented. Concentration profiles in the polarized layer near the membrane surface have been determined from these interferograms. In all cases, after about 20 min of ultrafiltration process, the profiles remained stable and a “pseudo-steady state” seemed to be reached. Moreover, solute concentration in the vicinity of the membrane did not reach much higher values than the initial concentration. |
Patrocinador/es: | This research was sponsored by the Plan Nacional de I+ D+I BQU2000-0456 (Ministerio de Educación y Cultura). Holographic interferometry equipment was financed by the Conselleria d’Educació i Ciencia (Generalitat Valenciana). |
URI: | http://hdl.handle.net/10045/2737 |
ISSN: | 0376-7388 |
DOI: | 10.1016/j.memsci.2003.10.029 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/j.memsci.2003.10.029 |
Aparece en las colecciones: | INV - TMIH - Artículos de Revistas INV - CONCEPT - Artículos de Revistas |
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