Experimental identification of the impact of direct internal and external methane reforming on SOFC by detailed online monitoring and supporting measurements

Höber, Michael; Königshofer, Benjamin; Schröttner, Hartmuth; Fitzek, Harald Matthias; Menzler, Norbert H.; Hochenauer, Christoph; Subotić, Vanja

doi:10.1016/j.jpowsour.2023.233449

Cited by 5 publications

(3 citation statements)

References 62 publications

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“…To solve the carbon deposition problem caused by direct electrochemical oxidation of methane, which leads to the degradation of the cell performance, catalytic reforming of methane can be carried out: one is external reforming, and the other is internal reforming. The external reforming process of methane is mainly performed in this reformer where methane is reformed with high-temperature steam to hydrogen and other substances, which are then passed to the anode of the fuel cell . However, the external reforming process increases the cost and reduces the energy conversion efficiency by adding a separate conversion unit.…”

Section: Frontier Problems Of Sofc Technology Utilizing Low-concentra...mentioning

confidence: 99%

“…The external reforming process of methane is mainly performed in this reformer where methane is reformed with high-temperature steam to hydrogen and other substances, which are then passed to the anode of the fuel cell. 68 However, the external reforming process increases the cost and reduces the energy conversion efficiency by adding a separate conversion unit.…”

Section: Challenges Of Sofc Technology Utilizing Low-concentration Cbmmentioning

confidence: 99%

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Review and Outlook on the Utilization of Low-Concentration Coalbed Methane for Power Generation by Solid Oxide Fuel Cells

Huang,

Li,

Yin

et al. 2024

Energy Fuels

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With the growing global demand for clean energy, more and more attention has been given to the energy conversion efficiency of low-quality fuels. A solid oxide fuel cell (SOFC) is expected to be one of the ideal technologies for clean and efficient utilization of low-concentration coalbed methane (CBM) because it can achieve efficient utilization of low-quality fuels. This review examines the challenges of SOFC technology fueled by low-concentration CBM. In comparison to fuels such as hydrogen and natural gas, lowconcentration CBM usually contains a large number of other gas components in addition to methane, which reduces the chemical reactivity of CBM and leads to a decrease in the utilization efficiency. The effects of different carbon-containing fuels on the cell performance of SOFC have been investigated by a great deal of research, and the results reveal that methane tends to be the main source of carbon deposition, whereas oxygen-containing fuels can have a positive effect on carbon deposition. In the current SOFC technology fueled by hydrocarbon fuels, concentration polarization is also a major factor contributing to the lack of durability and stability of the cell, with the exception of carbon deposition and sulfur poisoning. In addition, the temperature and other operating environments also have different degrees of influence on the cell performance in the SOFC technology fueled by low-concentration CBM. Therefore, the development of cell materials and the optimization of the system structure of a low-concentration CBM-fueled SOFC are still key research directions for the future.

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Section: Frontier Problems Of Sofc Technology Utilizing Low-concentra...mentioning

confidence: 99%

Section: Challenges Of Sofc Technology Utilizing Low-concentration Cbmmentioning

confidence: 99%

Review and Outlook on the Utilization of Low-Concentration Coalbed Methane for Power Generation by Solid Oxide Fuel Cells

Huang,

Li,

Yin

et al. 2024

Energy Fuels

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show abstract

“…Thanks to these features, SOFCs provide fuel flexibility in energy production, effectively utilizing various fuel sources such as hydrogen, biogas, and methane. Experimental and numerical studies on the use of hydrocarbon-based fuels in SOFCs are documented in the literature [7][8][9][10][11][12][13]. Rath et al conducted a performance analysis of an anode-supported SOFC under various operating conditions.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Thermodynamic Analysis of the Effect of Operating Temperature in Methane-Fueled SOFC

Kumuk,

Atak,

Dogan

et al. 2024

Energies

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This study examines the thermodynamic and numerical analyses of a methane-fed solid oxide fuel cell (SOFC) over a temperature range varying between 873 K and 1273 K. These analyses were conducted to investigate and compare the performance of the SOFC under various operating conditions in detail. As part of the thermodynamic analysis, important parameters such as cell voltage, power density, exergy destruction, entropy generation, thermal efficiency, and exergy efficiency were calculated. These calculations were used to conduct energy and exergy analyses of the cell. According to the findings, an increase in operating temperature led to a significant improvement in performance. At the initial conditions where the SOFC operated at a temperature of 1073 K and a current density of 9000 A/m2, it was observed that when the temperature increased by 200 K while keeping the current density constant, the power density increased by a factor of 1.90 compared to the initial state, and the thermal efficiency increased by a factor of 1.45. Under a constant current density, the voltage and power density values were 1.0081 V, 1.0543 V, 2337.13 W/m2, and 2554.72 W/m2 at operating temperatures of 1073 K and 1273 K, respectively. Under a current density of 4500 A/m2, the entropy generation in the cell was determined to be 29.48 kW/K at 973 K and 23.68 kW/K at 1173 K operating temperatures. The maximum exergy efficiency of the SOFC was calculated to be 41.67% at a working temperature of 1273 K and a current density of 1500 A/m2. This study is anticipated to be highly significant, as it examines the impact of temperature variation on exergy analysis in SOFC, validating both numerical and theoretical results, thus providing a crucial roadmap for determining optimized operating conditions.

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Applications – Transportation | Auxiliary power units: Fuel cells

Genovese,

Cigolotti,

Monteleone

et al. 2024

Reference Module in Chemistry, Molecular Sciences and Chemical Engineering

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Experimental identification of the impact of direct internal and external methane reforming on SOFC by detailed online monitoring and supporting measurements

Cited by 5 publications

References 62 publications

Review and Outlook on the Utilization of Low-Concentration Coalbed Methane for Power Generation by Solid Oxide Fuel Cells

Review and Outlook on the Utilization of Low-Concentration Coalbed Methane for Power Generation by Solid Oxide Fuel Cells

Numerical and Thermodynamic Analysis of the Effect of Operating Temperature in Methane-Fueled SOFC

Applications – Transportation | Auxiliary power units: Fuel cells

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