Numerical study on carbon deposition of SOFC with unsteady state variation of porosity

Yan, Min; Zeng, Min; Chen, Qiuyang; Wang, Qiuwang

doi:10.1016/j.apenergy.2012.02.055

Cited by 54 publications

(33 citation statements)

References 30 publications

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“…All the cases are operating in 1073 K and 1 atm, the velocity of both oxidizing agent and reducing agent remain the same with 4 m/s. The other related operating parameters and physical dimension of the model are the same as that in literature [20]. …”

Section: Introductionmentioning

confidence: 58%

“…A constant temperature condition and a heat convection condition are imposed on the inlets and outlets, respectively. All the source terms mentioned in the above equations can be found in literature [20]. When we consider the carbon deposition, the graphite produced by methane cracked reaction and Boudouard reaction will be absorbed at the surface of the catalyst.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Established mass fraction of fuel and air is given at the inlet of gas channels [20]. For the charge transfer equations, this study has chosen effective electron and ion conductivity as the physical property of the related materials.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Because of the porosity characteristics mentioned above, it is difficult for the catalyst to desorb the carbon. Based on the porosity variation rate we have investigated [20], the permeability of the porous layer is changed:…”

Section: Mathematical Modelmentioning

confidence: 99%

“…The damage due to carbon deposition in a SOFC under operation, fueled with tar-laden biomass gas was numerically studied by Singh et al [15]. Effective ways to minimize the carbon deposition in SOFCs were also studied by several researchers [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Electrical Performance and Carbon Deposition Differences between the Bi-Layer Interconnector and Conventional Straight Interconnector Solid Oxide Fuel Cell

Yan

Pei

Chen³

et al. 2014

Energies

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Carbon deposition considered in a solid oxide fuel cell (SOFC) model may be influenced by the operating voltage, inlet water/methane ratio, working temperature and pressure, inlet molar fraction of fuel and so on. The effects of these parameters in a planar SOFC implementing a novel bi-layer interconnector are not well understood. This paper is focused on the numerical study of carbon deposition and electrical performance of a bi-layer interconnector planar SOFC. The results illustrate that the electrical performance of the bi-layer interconnector SOFC is 11% higher than that of the conventional straight interconnector SOFC with initial state. After 120 days of operation, the electrical performance of the bi-layer interconnector SOFC has a slight decrease and more carbon deposit because of the increased electrochemical reaction rate. However, these differences minimize if higher operating voltages are involved.

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Section: Introductionmentioning

confidence: 58%

Section: Mathematical Modelmentioning

confidence: 99%

Section: Mathematical Modelmentioning

confidence: 99%

Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Electrical Performance and Carbon Deposition Differences between the Bi-Layer Interconnector and Conventional Straight Interconnector Solid Oxide Fuel Cell

Yan

Pei

Chen³

et al. 2014

Energies

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High Temperature Solid Oxide Electrolysis – Technology and Modeling

Mueller,

Klinsmann,

Sauter

et al. 2023

Chemie Ingenieur Technik

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In the global quest to renounce from fossil fuels, a large demand for the renewable production of hydrogen via water electrolysis exists. In this context, the solid oxide electrolyzer (SOE) is an interesting technology due to its high efficiency resulting from elevated operating temperatures of up to 900 °C. Physical modeling plays a vital role in the development of SOEs, as it lowers experimental costs and provides insight where measurements reach limits. A main challenge for modeling SOEs is the multitude of physical effects, occurring and interacting on various spatial and temporal scales. This requires assumptions and simplifications, particularly when increasing scope and dimensions of a model. In this review, we discuss the different approaches currently available in literature.

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Partial‐Load Analysis of a Temperature‐Controlled Solid‐Oxide Fuel Cell–Gas Turbine (SOFC–GT) Hybrid Power Plant

et al. 2015

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Due to high conversion efficiency and low environmental impact, solid‐oxide fuel cells coupled with a gas turbine (SOFC–GT) have received much attention. A proper stack temperature control strategy ensures safety and enhances performance. A heat management subsystem capable of adjusting the stack temperature is critical for the hybrid plant. Most present SOFC–GT plants deliver the full volume of the GT’s exhaust to heat up the stack. Stack cooling is realized by blowing extra air, which consumes more parasitic energy and impacts the plant’s conversion efficiency. In this study, a heat management subsystem has been added into the SOFC–GT plant. The stack average temperature can be adjusted by controlling the volume of the GT’s exhaust and additional fuel. In this way, the parasitic energy owing to the air compressor is reduced. To investigate the proposed plant’s performance, a corresponding model has been established. Simulation results of the specific operating point show that the heat management subsystem can maintain the stack average temperature at its proper value. Furthermore, based on the different air/additional fuel supply patterns, the partial‐load performance of the proposed plant has been compared, and an optimal partial‐load strategy is proposed. The proposed SOFC–GT plant shows a wide output range (370.0–1540.7 kW) with remarkable efficiency (56.8 %–75.0 %).

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Numerical study on carbon deposition of SOFC with unsteady state variation of porosity

Cited by 54 publications

References 30 publications

Electrical Performance and Carbon Deposition Differences between the Bi-Layer Interconnector and Conventional Straight Interconnector Solid Oxide Fuel Cell

Electrical Performance and Carbon Deposition Differences between the Bi-Layer Interconnector and Conventional Straight Interconnector Solid Oxide Fuel Cell

High Temperature Solid Oxide Electrolysis – Technology and Modeling

Partial‐Load Analysis of a Temperature‐Controlled Solid‐Oxide Fuel Cell–Gas Turbine (SOFC–GT) Hybrid Power Plant

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