Overpotentials analysis in solid acid fuel cell using CsH2PO4 as anhydrous membrane

Soraya Hosseini, Wan Ramli Wan Daud, Mohamad Rasool Malakbalaa, Salman Masoudi Soltani, Reza Zolfagharei

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this study, an over potential analysis was performed on a solid acid fuel cell using anhydrous membrane CsH2PO4 in order to investigate the produced losses. The voltage losses were analyzed into three main parts, activation, concentration and ohmic. The used equations were chosen semi-empirical equations (exchange current density), mathematical and material balance equations. Cesium dihydrogen phosphate (CsH2PO4) was used as anhydrous membrane and the proton conductivity was calculated based on the Arrhenius law. The combination of semi-empirical equations, mathematical and Nernst equation were used to represent a model for the formulation voltage versus current density regarding the over potentials. By considering the power differentiation to current density, a non-linear equation was used in order to determine optimum current and voltage via Matlab Fsolve nonlinear program. The exergy as energy quality can be estimated using the over potentials. The enthalpy and the entropy were calculated using a polynomial equation via JANAF data. Hydrogen with a small fraction of water vapor and air were selected as a fuel. In addition, a parametric study was also conducted to examine the effects of various operating conditions, such as temperature, fuel flow rate and catalyst layer thickness on the exergy and the energy efficiency of the system. The effects of pressure, temperature and catalyst layer thickness on the current and voltage were investigated. The results showed that superior protonic conductivity and stability can be obtained at 240 °C. The effects of the decreasing catalyst layer thickness and increasing the pressure indicated the improvement in the current density. The increasing catalyst quality showed more efficient than changing both parameters.

Original languageEnglish
Pages (from-to)123-132
Number of pages10
JournalWorld Journal of Modelling and Simulation
Volume7
Issue number2
Publication statusPublished - 2011

Fingerprint

Fuel Cell
Catalyst
Fuel cells
Current density
Membrane
Voltage
Membranes
Catalysts
Acids
Exergy
Electric potential
Conductivity
Proton conductivity
Water Vapor
Balance Equations
Polynomial equation
Cesium
Energy Efficiency
Phosphate
Nonlinear equations

Keywords

  • Cesium dihydrogen phosphate
  • Exergy
  • Over potential
  • Solid acid fuel cell

ASJC Scopus subject areas

  • Modelling and Simulation
  • Engineering(all)

Cite this

Hosseini, S., Wan Daud, W. R., Malakbalaa, M. R., Masoudi Soltani, S., & Zolfagharei, R. (2011). Overpotentials analysis in solid acid fuel cell using CsH2PO4 as anhydrous membrane. World Journal of Modelling and Simulation, 7(2), 123-132.

Overpotentials analysis in solid acid fuel cell using CsH2PO4 as anhydrous membrane. / Hosseini, Soraya; Wan Daud, Wan Ramli; Malakbalaa, Mohamad Rasool; Masoudi Soltani, Salman; Zolfagharei, Reza.

In: World Journal of Modelling and Simulation, Vol. 7, No. 2, 2011, p. 123-132.

Research output: Contribution to journalArticle

Hosseini, S, Wan Daud, WR, Malakbalaa, MR, Masoudi Soltani, S & Zolfagharei, R 2011, 'Overpotentials analysis in solid acid fuel cell using CsH2PO4 as anhydrous membrane', World Journal of Modelling and Simulation, vol. 7, no. 2, pp. 123-132.
Hosseini, Soraya ; Wan Daud, Wan Ramli ; Malakbalaa, Mohamad Rasool ; Masoudi Soltani, Salman ; Zolfagharei, Reza. / Overpotentials analysis in solid acid fuel cell using CsH2PO4 as anhydrous membrane. In: World Journal of Modelling and Simulation. 2011 ; Vol. 7, No. 2. pp. 123-132.
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