An accurate way to determine the ionic conductivity of mixed ionic-electronic conducting (MIEC) ceramics

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

Measuring oxygen transport through dense, mixed ion–electron conducting, ceramic membranes is usually performed in a lab-scale permeationset-up where feed and sweep gas are directly flushed to the membrane surface. Due to concentration gradients, the oxygen partial pressure PO2 measured at the outlet is not the same as on the membrane surface, leading to inaccurate calculations of the oxygen ionic conductivity (σion) ofthe membrane. A computational fluid dynamics (CFD) model is developed to determine the exact PO2on the membrane surface. With this model,oxygen ionic conductivity of a model membrane, SrCo0.8Fe0.2O3−δ, is calculated. By comparing σion, based on perfect gas mixing with valuesbased on the CFD model, it is found that the former one is overestimated by ∼50–180% in the temperature and PO2range regarded. In addition,the influence of parameters, like type and flow rate of the sweep gas, is studied.© 2015 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)3075-3083
JournalJournal of the European Ceramic Society
Volume35
Issue number11
DOIs
Publication statusPublished - 2015

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Ionic conductivity
Membranes
Oxygen
Gases
Dynamic models
Computational fluid dynamics
Ions
Ceramic membranes
Partial pressure
Flow rate
Temperature

Keywords

  • IR-99489
  • METIS-315946

Cite this

@article{1cb7f520a0514b928f7878cfc724c5b4,
title = "An accurate way to determine the ionic conductivity of mixed ionic-electronic conducting (MIEC) ceramics",
abstract = "Measuring oxygen transport through dense, mixed ion–electron conducting, ceramic membranes is usually performed in a lab-scale permeationset-up where feed and sweep gas are directly flushed to the membrane surface. Due to concentration gradients, the oxygen partial pressure PO2 measured at the outlet is not the same as on the membrane surface, leading to inaccurate calculations of the oxygen ionic conductivity (σion) ofthe membrane. A computational fluid dynamics (CFD) model is developed to determine the exact PO2on the membrane surface. With this model,oxygen ionic conductivity of a model membrane, SrCo0.8Fe0.2O3−δ, is calculated. By comparing σion, based on perfect gas mixing with valuesbased on the CFD model, it is found that the former one is overestimated by ∼50–180{\%} in the temperature and PO2range regarded. In addition,the influence of parameters, like type and flow rate of the sweep gas, is studied.{\circledC} 2015 Elsevier Ltd. All rights reserved.",
keywords = "IR-99489, METIS-315946",
author = "Wei Chen and N. Nauels and Bouwmeester, {Henricus J.M.} and Arian Nijmeijer and Winnubst, {Aloysius J.A.}",
year = "2015",
doi = "10.1016/j.jeurceramsoc.2015.04.019",
language = "English",
volume = "35",
pages = "3075--3083",
journal = "Journal of the European Ceramic Society",
issn = "0955-2219",
publisher = "Elsevier",
number = "11",

}

An accurate way to determine the ionic conductivity of mixed ionic-electronic conducting (MIEC) ceramics. / Chen, Wei; Nauels, N.; Bouwmeester, Henricus J.M.; Nijmeijer, Arian; Winnubst, Aloysius J.A.

In: Journal of the European Ceramic Society, Vol. 35, No. 11, 2015, p. 3075-3083.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - An accurate way to determine the ionic conductivity of mixed ionic-electronic conducting (MIEC) ceramics

AU - Chen, Wei

AU - Nauels, N.

AU - Bouwmeester, Henricus J.M.

AU - Nijmeijer, Arian

AU - Winnubst, Aloysius J.A.

PY - 2015

Y1 - 2015

N2 - Measuring oxygen transport through dense, mixed ion–electron conducting, ceramic membranes is usually performed in a lab-scale permeationset-up where feed and sweep gas are directly flushed to the membrane surface. Due to concentration gradients, the oxygen partial pressure PO2 measured at the outlet is not the same as on the membrane surface, leading to inaccurate calculations of the oxygen ionic conductivity (σion) ofthe membrane. A computational fluid dynamics (CFD) model is developed to determine the exact PO2on the membrane surface. With this model,oxygen ionic conductivity of a model membrane, SrCo0.8Fe0.2O3−δ, is calculated. By comparing σion, based on perfect gas mixing with valuesbased on the CFD model, it is found that the former one is overestimated by ∼50–180% in the temperature and PO2range regarded. In addition,the influence of parameters, like type and flow rate of the sweep gas, is studied.© 2015 Elsevier Ltd. All rights reserved.

AB - Measuring oxygen transport through dense, mixed ion–electron conducting, ceramic membranes is usually performed in a lab-scale permeationset-up where feed and sweep gas are directly flushed to the membrane surface. Due to concentration gradients, the oxygen partial pressure PO2 measured at the outlet is not the same as on the membrane surface, leading to inaccurate calculations of the oxygen ionic conductivity (σion) ofthe membrane. A computational fluid dynamics (CFD) model is developed to determine the exact PO2on the membrane surface. With this model,oxygen ionic conductivity of a model membrane, SrCo0.8Fe0.2O3−δ, is calculated. By comparing σion, based on perfect gas mixing with valuesbased on the CFD model, it is found that the former one is overestimated by ∼50–180% in the temperature and PO2range regarded. In addition,the influence of parameters, like type and flow rate of the sweep gas, is studied.© 2015 Elsevier Ltd. All rights reserved.

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KW - METIS-315946

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M3 - Article

VL - 35

SP - 3075

EP - 3083

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

SN - 0955-2219

IS - 11

ER -