Membrane mass transport by nanofiltration: Coupled effect of the polarization and membrane layers

E. Nagy, Edina Kulcsár, András Nagy

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The effect of the concentration boundary layer on the pressure-driven membrane separation like nanofiltration or ultrafiltration is well-known and extensively discussed in the literature. In most of these studies, the effect of the boundary layer and that of the membrane layer on the separation efficiency are discussed separately. This paper presents a general model to describe the convective and diffusive mass transport taking into account the simultaneous effect of both the concentration boundary layer and the membrane layer. It has been demonstrated how the Peclet number of the membrane, the ratio of diffusive mass transfer coefficient of the membrane to that of the polarization layer and the product of the steric partition coefficient and the convection hindrance factor affect the permeate concentration or the rejection coefficient. Comparing the measured and calculated data, it has been proven that the effect of the polarization layer can significantly affect the separation efficiency during practical nanofiltration of uncharged compounds. The model developed gives a general treatment method to evaluate pressure-driven membrane separation processes.

Original languageEnglish
Pages (from-to)215-222
Number of pages8
JournalJournal of Membrane Science
Volume368
Issue number1-2
DOIs
Publication statusPublished - Feb 15 2011

Fingerprint

Nanofiltration
Mass transfer
Polarization
membranes
Membranes
polarization
boundary layers
Boundary layers
coefficients
Pressure
Convection
Peclet number
Ultrafiltration
rejection
mass transfer
partitions
convection
products

Keywords

  • Concentration polarization
  • Nanofiltration
  • Polarization modulus
  • Rejection coefficient
  • Simultaneous effect of polarization and membrane layer

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Science(all)
  • Biochemistry
  • Filtration and Separation

Cite this

Membrane mass transport by nanofiltration : Coupled effect of the polarization and membrane layers. / Nagy, E.; Kulcsár, Edina; Nagy, András.

In: Journal of Membrane Science, Vol. 368, No. 1-2, 15.02.2011, p. 215-222.

Research output: Contribution to journalArticle

@article{448d834c2d1d42479d1fa11083921286,
title = "Membrane mass transport by nanofiltration: Coupled effect of the polarization and membrane layers",
abstract = "The effect of the concentration boundary layer on the pressure-driven membrane separation like nanofiltration or ultrafiltration is well-known and extensively discussed in the literature. In most of these studies, the effect of the boundary layer and that of the membrane layer on the separation efficiency are discussed separately. This paper presents a general model to describe the convective and diffusive mass transport taking into account the simultaneous effect of both the concentration boundary layer and the membrane layer. It has been demonstrated how the Peclet number of the membrane, the ratio of diffusive mass transfer coefficient of the membrane to that of the polarization layer and the product of the steric partition coefficient and the convection hindrance factor affect the permeate concentration or the rejection coefficient. Comparing the measured and calculated data, it has been proven that the effect of the polarization layer can significantly affect the separation efficiency during practical nanofiltration of uncharged compounds. The model developed gives a general treatment method to evaluate pressure-driven membrane separation processes.",
keywords = "Concentration polarization, Nanofiltration, Polarization modulus, Rejection coefficient, Simultaneous effect of polarization and membrane layer",
author = "E. Nagy and Edina Kulcs{\'a}r and Andr{\'a}s Nagy",
year = "2011",
month = "2",
day = "15",
doi = "10.1016/j.memsci.2010.11.046",
language = "English",
volume = "368",
pages = "215--222",
journal = "Jornal of Membrane Science",
issn = "0376-7388",
publisher = "Elsevier",
number = "1-2",

}

TY - JOUR

T1 - Membrane mass transport by nanofiltration

T2 - Coupled effect of the polarization and membrane layers

AU - Nagy, E.

AU - Kulcsár, Edina

AU - Nagy, András

PY - 2011/2/15

Y1 - 2011/2/15

N2 - The effect of the concentration boundary layer on the pressure-driven membrane separation like nanofiltration or ultrafiltration is well-known and extensively discussed in the literature. In most of these studies, the effect of the boundary layer and that of the membrane layer on the separation efficiency are discussed separately. This paper presents a general model to describe the convective and diffusive mass transport taking into account the simultaneous effect of both the concentration boundary layer and the membrane layer. It has been demonstrated how the Peclet number of the membrane, the ratio of diffusive mass transfer coefficient of the membrane to that of the polarization layer and the product of the steric partition coefficient and the convection hindrance factor affect the permeate concentration or the rejection coefficient. Comparing the measured and calculated data, it has been proven that the effect of the polarization layer can significantly affect the separation efficiency during practical nanofiltration of uncharged compounds. The model developed gives a general treatment method to evaluate pressure-driven membrane separation processes.

AB - The effect of the concentration boundary layer on the pressure-driven membrane separation like nanofiltration or ultrafiltration is well-known and extensively discussed in the literature. In most of these studies, the effect of the boundary layer and that of the membrane layer on the separation efficiency are discussed separately. This paper presents a general model to describe the convective and diffusive mass transport taking into account the simultaneous effect of both the concentration boundary layer and the membrane layer. It has been demonstrated how the Peclet number of the membrane, the ratio of diffusive mass transfer coefficient of the membrane to that of the polarization layer and the product of the steric partition coefficient and the convection hindrance factor affect the permeate concentration or the rejection coefficient. Comparing the measured and calculated data, it has been proven that the effect of the polarization layer can significantly affect the separation efficiency during practical nanofiltration of uncharged compounds. The model developed gives a general treatment method to evaluate pressure-driven membrane separation processes.

KW - Concentration polarization

KW - Nanofiltration

KW - Polarization modulus

KW - Rejection coefficient

KW - Simultaneous effect of polarization and membrane layer

UR - http://www.scopus.com/inward/record.url?scp=78650512872&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78650512872&partnerID=8YFLogxK

U2 - 10.1016/j.memsci.2010.11.046

DO - 10.1016/j.memsci.2010.11.046

M3 - Article

AN - SCOPUS:78650512872

VL - 368

SP - 215

EP - 222

JO - Jornal of Membrane Science

JF - Jornal of Membrane Science

SN - 0376-7388

IS - 1-2

ER -