Development of a methodology to optimize the air bleed in PEMFC systems operating with low quality hydrogen

Luis Pérez, T. Rajala, Jari Ihonen, Pauli Koski, J.M. Sousa, A. Mendes (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)

Abstract

The use of hydrogen with lower quality than that specified in current regulation is an attractive option for stationary PEMFC power production. In this paper, the effect of CO is mitigated using air bleed levels up to 2% in an H2 PEMFC fed with CO concentrations below 20 ppm. A methodology to optimize the air bleed levels is developed using a novel arrangement of cells coupled to a gas chromatograph. The methodology relies on evaluating the distributed performance of the cell and on determining the CO and CO2 molar flow rates at the anode outlet. Furthermore, the amount of CO adsorbed onto the catalyst and the fraction of catalytic sites covered by CO are estimated. The results show that different parameters, such as the H2 volumetric flow rate, CO concentration and air bleed level, influence both the steady state and dynamics of PEMFCs operated with low quality hydrogen.
Original languageEnglish
Pages (from-to)16286-16299
Number of pages13
JournalInternational Journal of Hydrogen Energy
Volume38
Issue number36
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

Fingerprint

Proton exchange membrane fuel cells (PEMFC)
methodology
Hydrogen
air
hydrogen
flow velocity
Air
Flow rate
outlets
cells
Anodes
anodes
catalysts
Catalysts
Gases
gases

Keywords

  • air bleed
  • carbon monoxide
  • gas chromatography
  • hydrogen quality
  • segmented PEMFC

Cite this

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title = "Development of a methodology to optimize the air bleed in PEMFC systems operating with low quality hydrogen",
abstract = "The use of hydrogen with lower quality than that specified in current regulation is an attractive option for stationary PEMFC power production. In this paper, the effect of CO is mitigated using air bleed levels up to 2{\%} in an H2 PEMFC fed with CO concentrations below 20 ppm. A methodology to optimize the air bleed levels is developed using a novel arrangement of cells coupled to a gas chromatograph. The methodology relies on evaluating the distributed performance of the cell and on determining the CO and CO2 molar flow rates at the anode outlet. Furthermore, the amount of CO adsorbed onto the catalyst and the fraction of catalytic sites covered by CO are estimated. The results show that different parameters, such as the H2 volumetric flow rate, CO concentration and air bleed level, influence both the steady state and dynamics of PEMFCs operated with low quality hydrogen.",
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Development of a methodology to optimize the air bleed in PEMFC systems operating with low quality hydrogen. / Pérez, Luis; Rajala, T.; Ihonen, Jari; Koski, Pauli; Sousa, J.M.; Mendes, A. (Corresponding Author).

In: International Journal of Hydrogen Energy, Vol. 38, No. 36, 2013, p. 16286-16299.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Development of a methodology to optimize the air bleed in PEMFC systems operating with low quality hydrogen

AU - Pérez, Luis

AU - Rajala, T.

AU - Ihonen, Jari

AU - Koski, Pauli

AU - Sousa, J.M.

AU - Mendes, A.

PY - 2013

Y1 - 2013

N2 - The use of hydrogen with lower quality than that specified in current regulation is an attractive option for stationary PEMFC power production. In this paper, the effect of CO is mitigated using air bleed levels up to 2% in an H2 PEMFC fed with CO concentrations below 20 ppm. A methodology to optimize the air bleed levels is developed using a novel arrangement of cells coupled to a gas chromatograph. The methodology relies on evaluating the distributed performance of the cell and on determining the CO and CO2 molar flow rates at the anode outlet. Furthermore, the amount of CO adsorbed onto the catalyst and the fraction of catalytic sites covered by CO are estimated. The results show that different parameters, such as the H2 volumetric flow rate, CO concentration and air bleed level, influence both the steady state and dynamics of PEMFCs operated with low quality hydrogen.

AB - The use of hydrogen with lower quality than that specified in current regulation is an attractive option for stationary PEMFC power production. In this paper, the effect of CO is mitigated using air bleed levels up to 2% in an H2 PEMFC fed with CO concentrations below 20 ppm. A methodology to optimize the air bleed levels is developed using a novel arrangement of cells coupled to a gas chromatograph. The methodology relies on evaluating the distributed performance of the cell and on determining the CO and CO2 molar flow rates at the anode outlet. Furthermore, the amount of CO adsorbed onto the catalyst and the fraction of catalytic sites covered by CO are estimated. The results show that different parameters, such as the H2 volumetric flow rate, CO concentration and air bleed level, influence both the steady state and dynamics of PEMFCs operated with low quality hydrogen.

KW - air bleed

KW - carbon monoxide

KW - gas chromatography

KW - hydrogen quality

KW - segmented PEMFC

U2 - 10.1016/j.ijhydene.2013.10.037

DO - 10.1016/j.ijhydene.2013.10.037

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VL - 38

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JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

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ER -