Study of the reverse water gas shift (RWGS) reaction over Pt in a solid oxide fuel cell (SOFC) operating under open and closed-circuit conditions

2007 ◽  
Vol 127 (1-4) ◽  
pp. 337-346 ◽  
Author(s):  
G. Pekridis ◽  
K. Kalimeri ◽  
N. Kaklidis ◽  
E. Vakouftsi ◽  
E.F. Iliopoulou ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Solid Oxide ◽  
Water Gas Shift ◽  
Closed Circuit ◽  
Oxide Fuel ◽  
Reverse Water Gas Shift ◽  
Rwgs Reaction ◽  
Water Gas

scholarly journals Dynamic Modeling of a Solid Oxide Fuel Cell System in Modelica

2010 ◽  
Author(s):  
Daniel Andersson ◽  
Erik A˚berg ◽  
Jinliang Yuan ◽  
Bengt Sunde´n ◽  
Jonas Eborn
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Steam Reforming ◽  
Cell System ◽  
Solid Oxide ◽  
Water Gas Shift ◽  
Oxide Fuel ◽  
Fuel Cell System ◽  
Water Gas ◽  
Stack Model

In this study a dynamic model of a solid oxide fuel cell (SOFC) system has been developed. The work has been conducted in a cooperation between the Department of Energy Sciences, Lund University, and Modelon AB using the Modelica language and the Dymola modeling and simulation tool. Modelica is an equation based, object oriented modeling language, which promotes flexibility and reuse of code. The objective of the study is to investigate the suitability of the Modelica language for dynamic fuel cell system modeling. A cell electrolyte model including ohmic, activation and concentration irreversibilities is implemented and verified against simulations and experimental data presented in the open literature. A 1D solid oxide fuel cell model is created by integrating the electrolyte model and a 1D fuel flow model, which includes dynamic internal steam reforming of methane and water-gas shift reactions. Several cells are then placed with parallel flow paths and connected thermally and electrically in series. By introducing a manifold pressure drop, a stack model is created. The stack model is applied in a complete system including an autothermal reformer, a catalytic after-burner, a steam generator and heat exchangers. Four reactions are modeled in the autothermal reformer; two types of methane steam reforming, the water-gas shift reaction and total combustion of methane. The simulation results have been compared with those in the literature and it can be concluded that the models are accurate and that Dymola and Modelica are tools well suited for simulations of the transient fuel cell system behaviour.

Analysis of an Integrated Downdraft Gasifier/SOFC System Biomass Fueled

2011 ◽  
Author(s):  
Gennaro Campitelli ◽  
Vincenzo Mulone ◽  
Stefano Cordiner ◽  
Mridul Gautam
Keyword(s):  
Fuel Cell ◽  
Moisture Content ◽  
Renewable Energy Sources ◽  
Operating Conditions ◽  
Solid Oxide ◽  
Water Gas Shift ◽  
Oxide Fuel ◽  
Thermal Integration ◽  
The Impact ◽  
Water Gas

The connection between combined power and heat generation, and the concept of distributed generation is a relevant issue viz. improvement of the overall efficiency of energy conversion and distribution. In this context, the use of biomass may be of particular interest due to its potentially very low CO2 emissions as well as low kWh production cost with respect to other renewable energy sources. Traditional methods to convert biomass involve micro-turbines or steam power plants. However, both electrical and overall efficiencies may not be particularly high for both technological and thermodynamic reasons; the latter being hard to supersede. High temperature Solid Oxide Fuel Cells (SOFCs) offer an attractive solution because they are characterized by electrical efficiencies in the range of 35% to 48% [1], and present a significant potential for integrating with the biomass gasification process; thus, exploiting advantages of high operating temperatures. Moreover, thermal integration is of prime importance. In fact, optimal management of thermal integration may allow operation with high moisture content feedstocks and with high water concentration in the SOFC; thus, promoting further hydrogen production via the water gas shift reaction [2]. In this paper, an integrated solid oxide fuel cell-gasifier system is modeled to identify the main effects on fuel cell performance under several operating conditions in terms of biomass flow rates and moisture contents. The SOFC and the gasifier are modeled by a zero dimensional approach to perform a sensitivity analysis with a numerical tool which requires less computational effort compared to those previously presented. The thermochemical phenomena are taken into account with a high degree of detail, and model validation is also showed via comparison with literature available data. Results highlight the impact of biomass feedstock and its moisture content on the electrical current density value. Final performance depends on the interaction among gasifier thermal sustainability, SOFC operating temperature and chemical equilibrium concentrations, via water gas shift reactions. In particular, it has been shown that thermal integration allows operation with higher moisture content biomass, thereby further exploiting H2O conversion into H2 via water gas shift reactions and high fuel utilization operating conditions. The importance of thermal integration and advanced control of SOFC based biomass fueled systems is demonstrated by this study, as well as the use of a fast and reliable zero-dimensional modeling for system design and control purpose.

Phase Inversion Tape Casting and Electrochemical Performance of Solid Oxide Fuel Cell Anode

2015 ◽  
Vol 30 (12) ◽  
pp. 1291
Author(s):  
ZHANG Yu-Yue ◽  
LIN Jie ◽  
MIAO Guo-Shuan ◽  
GAO Jian-Feng ◽  
CHEN Chu-Sheng ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Electrochemical Performance ◽  
Solid Oxide Fuel Cell ◽  
Phase Inversion ◽  
Tape Casting ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Cell Anode ◽  
Fuel Cell Anode

scholarly journals Computational study of the mixed B-site perovskite SmBxCo1−xO3−d (B = Mn, Fe, Ni, Cu) for next generation solid oxide fuel cell cathodes

2019 ◽  
Vol 21 (18) ◽  
pp. 9407-9418 ◽  
Author(s):  
Emilia Olsson ◽  
Jonathon Cottom ◽  
Xavier Aparicio-Anglès ◽  
Nora H. de Leeuw
Keyword(s):  
Fuel Cell ◽  
Physical Properties ◽  
Solid Oxide Fuel Cell ◽  
Computational Study ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Next Generation ◽  
Sofc Cathode ◽  
Fuel Cell Cathodes ◽  
Cell Cathodes

The effect of Co-site doping on the electronic, magnetic, and physical properties of next-generation SOFC cathode SmCoO3.

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