Multi-physicochemical modeling of direct methane fueled solid oxide fuel cells

Xie, Yuanyuan; Ding, Hanping; Xue, Xingjian

doi:10.1016/j.jpowsour.2013.06.028

Cited by 13 publications

(6 citation statements)

References 23 publications

(21 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The model was applied to study the possibility of carbon deposition at various conditions. Xie et al developed a model for direct methane fueled SOFC considering elementary chemical reactions and H 2 /CO electro-oxidation processes (7). The results showed that surface carbon deposition decreased with increasing temperature and operating current.…”

Section: Introductionmentioning

confidence: 99%

Elementary Reaction Kinetic Model of an Anode-Supported Syngas Fueled Solid Oxide Fuel Cell Considering the Carbon Deposition Effect

et al. 2021

View full text Add to dashboard Cite

A one-dimensional transient elementary reaction kinetic model of an anode supported solid oxide fuel cell (SOFC) fueled with syngas is developed considering the carbon deposition effect. This model incorporates the coupling effect of heterogeneous elementary chemical and electrochemical reactions, the electrode microstructure and the charge, and mass transport processes. The model is validated by both experimental I-V curves and electrochemical impedance spectra. The simulation results agree reasonably well with the experimental data. The numerical results of carbon deposition simulation indicate that the surface carbon coverage can be decreased by increasing the operating temperature and reducing the carbon dioxide, methane, or carbon monoxide in the fuel.

show abstract

Section: Introductionmentioning

confidence: 99%

Elementary Reaction Kinetic Model of an Anode-Supported Syngas Fueled Solid Oxide Fuel Cell Considering the Carbon Deposition Effect

et al. 2021

View full text Add to dashboard Cite

show abstract

“…From Figure 8a it is evident that both CO and H 2 can be directly electro-oxidized within the SOFC at this temperature. It has sometimes been conjectured 50 that in the presence of both CO and H 2 , the main fuel electrochemically oxidized is H 2 , while CO is oxidized indirectly via the water gas shift (WGS) reaction, i.e., CO + H 2 O ⇌ CO 2 + H 2 (reverse of OR 2 ), followed by electrooxidation of the hence formed H 2 which, of course, also produces the water needed for the WGS reaction. However, because there is no H 2 O present in the experiments with a pure CO feed, it clearly shows that CO is directly electro-oxidized in the SOFC operating at 900 °C with a facility almost equal to that for H 2 (Figure 8a).…”

Section: Energy and Fuelsmentioning

confidence: 99%

Exploring Conditions That Enhance Durability and Performance of a Tubular Solid Oxide Fuel Cell Fed with Simulated Biogas

Jones

Persky²,

Datta

2017

Energy Fuels

View full text Add to dashboard Cite

Tubular solid-oxide fuel cells (t-SOFCs) fed directly with biogas, an equiproportioned mixture of CH 4 and CO 2 produced by fermentation of organic waste, are subject to nonuniform thermal stresses due to internal dry reforming in the anode entrance region coupled with structure exfoliation due to coking, resulting eventually in cell rupture. The integral t-SOFC is of practical interest, although many laboratory studies are conducted in differential button cells. Guided by mechanistic understanding and a robust thermodynamic model, the operating temperature and biogas feed composition were explored experimentally in order to enhance durability and performance of the t-SOFC. Thus, a temperature of 900 °C, a feed CH 4 /CO 2 ratio of 45/55, and a fuel utilization ≥25% were found to be optimal. The cell durability, performance, efficiency, and outlet gas composition at open-circuit voltage (OCV) as well as at different loads were found to be in accord with a thermodynamic analysis and mechanistic understanding based on a set of four independent overall reactions (ORs). It is shown that the OCV is independent of the chosen electrodic OR. In addition to single-tube experiments, a 5-tube SOFC pilot-unit was preliminarily tested as a step toward scale-up of this promising renewable energy technology.

show abstract

“…A literature review revealed that the performance of direct methane-fueled solid oxide fuel cells has been examined under various parameters using different computational fluid dynamics programs [34][35][36]. Xie et al numerically examined solid oxide fuel cells operated with direct methane at 600 • C, 650 • C, and 700 • C. The analysis results indicated that the anode reaction processes in SOFCs operated with direct methane were slower than the cathode oxygen reduction process.…”

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

View full text Add to dashboard Cite

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.

show abstract

Multi-physicochemical modeling of direct methane fueled solid oxide fuel cells

Cited by 13 publications

References 23 publications

Elementary Reaction Kinetic Model of an Anode-Supported Syngas Fueled Solid Oxide Fuel Cell Considering the Carbon Deposition Effect

Elementary Reaction Kinetic Model of an Anode-Supported Syngas Fueled Solid Oxide Fuel Cell Considering the Carbon Deposition Effect

Exploring Conditions That Enhance Durability and Performance of a Tubular Solid Oxide Fuel Cell Fed with Simulated Biogas

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

Contact Info

Product

Resources

About