Modeling of electrochemistry and steam–methane reforming performance for simulating pressurized solid oxide fuel cell stacks

Recknagle, Kurtis P.; Ryan, Emily M.; Koeppel, Brian J.; Mahoney, Lenna A.; Khaleel, Mohammad A.

doi:10.1016/j.jpowsour.2010.04.024

Cited by 34 publications

(23 citation statements)

References 23 publications

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“…Extensive experimental and modeling studies have been performed to understand the methane internal steam reforming (MSR) and water gas shift reaction (WGSR) kinetics in SOFCs and their effects on SOFC performance [11][12][13][14][15][16][17][18][19][20][21][22][23]. For describing the reaction kinetics of MSR and WGSR, global reaction schemes are widely used due to their easy implementation and less computational time [11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Modeling and parametric simulations of solid oxide fuel cells with methane carbon dioxide reforming

2013

Energy Conversion and Management

122

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Section: Introductionmentioning

confidence: 99%

“…For describing the reaction kinetics of MSR and WGSR, global reaction schemes are widely used due to their easy implementation and less computational time [11][12][13][14][15][16][17]. Detailed elementary reaction schemes are also employed for internal reforming SOFCs [18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Modeling and parametric simulations of solid oxide fuel cells with methane carbon dioxide reforming

2013

Energy Conversion and Management

122

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“…Other parameters include the equilibrium constants, which depend on known gasphase thermodynamics. Empirical representations of a steam-reforming rate expression are available (e.g., [42][43][44]). Additionally, modeling the microstructural transport problem also requires at least pore diffusion coefficients for the four gas-phase species.…”

Section: Possible Extensionsmentioning

confidence: 99%

Modeling reaction–diffusion processes within catalyst washcoats: I. Microscale processes based on three-dimensional reconstructions

Karakaya¹,

Weddle²,

Blasi³

et al. 2016

Chemical Engineering Science

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This paper develops a detailed analysis of reaction-diffusion processes within a porous rhodium-alumina catalyst washcoat. Focused-ion-beam-scanningelectron-microscope (FIB-SEM) techniques are developed and applied to reconstruct the actual catalyst-support microstructure. Three-dimensional transport processes within washcoat micro-pore structures are modeled using a dimensionless representation of reaction and diffusion rates based on the Damköhler number. Three-dimensional computational solutions for particular porous microstructures are modeled and interpreted. In a companion paper, these microstructural results are used to assist development of largerscale models that can be incorporated into reactor-scale simulations.

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“…CO oxidation influences the overall performance of the cell and on the other hand, polarization losses have an impact upon outlet voltage directly. In many studies, CO oxidation in electrochemical reactions is neglected or polarization losses are not completely accounted for [19,30,[35][36][37][38][39][40][41][42][43][44][45]. Hofman et al [46] assumed that when both species of H 2 and CO are present in the system, CO mostly participates in the water-gas shift reaction rather than in the electrochemical process due to its fast kinetics.…”

Section: Introductionmentioning

confidence: 99%

Modeling of a Tubular‐SOFC: The Effect of the Thermal Radiation of Fuel Components and CO Participating in the Electrochemical Process

et al. 2012

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A mathematical model based on first principles is developed to study the effect of heat and electrochemical phenomena on a tubul solid oxide fuel cell (SOFC). The model accounts fordiffusion, inherent impedance, transport (momentum, heat and mass transfer) processes, internal reforming/shifting reaction, electrochemical processes, and potential losses (activation, concentration, and ohmic losses). Thermal radiation of fuel gaseous components is considered in detail in this work in contrast to other reported work in the literature. The effect of thermal radiation on SOFC performance is shown by comparing with a model without this factor. Simulation results indicate that at higher inlet fuel flow pressures and also larger SOFC lengths the effect of thermal radiation on SOFC temperature becomes more significant. In this study, the H2 and CO oxidation is also studied and the effect of CO oxidation on SOFC performance is reported. The results show that the model which accounts for the electrochemical reaction ofCO results in better SOFC performance than other reported models. This work also reveals that at low inlet fuel flow pressures the CO and H2 electrochemical reactions are competitive and significantly dependent on the CO/H2 ratio inside the triple phase boundary.

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Modeling of electrochemistry and steam–methane reforming performance for simulating pressurized solid oxide fuel cell stacks

Cited by 34 publications

References 23 publications

Modeling and parametric simulations of solid oxide fuel cells with methane carbon dioxide reforming

Modeling and parametric simulations of solid oxide fuel cells with methane carbon dioxide reforming

Modeling reaction–diffusion processes within catalyst washcoats: I. Microscale processes based on three-dimensional reconstructions

Modeling of a Tubular‐SOFC: The Effect of the Thermal Radiation of Fuel Components and CO Participating in the Electrochemical Process

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