Prediction of the performance of a solid oxide fuel cell fuelled with biosyngas: Influence of different steam-reforming reaction kinetic parameters

Fan, Limin; Dimitriou, Eleni; Pourquié, Mathieu; Liu, M.; Verkooijen, A.H.M.; Aravind, P.V.

doi:10.1016/j.ijhydene.2012.09.061

Cited by 27 publications

(19 citation statements)

References 52 publications

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“…3. Methane concentration decreases rapidly because the reaction can happen much faster when the activation energy is within a certain range (14). As shown in Fig.…”

Section: Predicted Cell Performance With Different Reforming Kineticsmentioning

confidence: 94%

“…The modeling results also match well with the previous work from Paradis et al (13) in terms of the gas concentration changes. Further information about the influence of activation energy on the gas compositions along the channel can be found in our previous work (14).…”

Section: Predicted Cell Performance With Different Reforming Kineticsmentioning

confidence: 99%

“…It also shows that the methane steam reforming kinetics has a significant influence on the performance even with a small amount of methane in the biosyngas. Therefore, the activation energy for the internal steam reforming reactions of methane on the cell performance has been investigated in detail (14) by carefully studying literature on the steam reforming reaction kinetics from experimental investigations and by selectively applying the findings into this model. All the simulated results are meaningful for the conducting useful SOFC experiments.…”

Section: Introductionmentioning

confidence: 99%

“…1 (c) shows the cross section of the single cell unit and the grids for the model calculation. The model input data and the operating parameters of the presented model can be found from our previous work (14,15).…”

Section: Introductionmentioning

confidence: 99%

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Kinetics of Internal Methane Steam Reforming in Solid Oxide Fuel Cells and Its Influence on Cell Performance– Coupling Experiments and Modeling

et al. 2013

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Mathematical modeling tools are useful for predicting the safe operation limits and efficiencies of SOFCs. For a particular SOFC design, variations in internal methane reforming kinetic parameters is expected to affect local gas compositions, local Nernst voltages, current densities and temperature profiles and in turn the safe operation limits and efficiency. However, it is observed that methane reforming kinetic data widely used in SOFC CFD models are often determined from measurements on nickel catalysts taken under experimental conditions not close enough to SOFC operation conditions causing significant inaccuracies in model calculation results. For this reason, kinetic properties of the methane steam reforming reaction in complete fuel cells with Ni-GDC (Gd 0.1 Ce 0.9 O 2 ) anodes were experimentally evaluated. SOFCs with different anodes made of different materials may perform differently due to the different reforming kinetics and the different thermal properties. IntroductionFuel cell technology appears to be a promising generation of novel power sources. One of the essential advantages for the efficient operation of solid oxide fuel cells (SOFCs) is the flexible choice of fuel. Under certain conditions, natural gas or biosyngas (including CH 4 ) can be introduced into SOFCs directly as fuel gases without any external reformers (1). This is because the SOFC anodes can catalyze the steam reforming of CH 4 (2-5). With internal steam reforming, solid oxide fuel cell (SOFC) systems have the potential to become a promising technology (6, 7). A large variation of steam reforming kinetics is provided in literature, and the experimental data are obtained under different conditions (3-5, 8, 9). Influence of different reforming kinetics combined with different thermal properties on the cell performances is still unknown.Mathematical modeling is an effective tool to facilitate predicting appropriate design of fuel cell systems. A CFD model of a biogas (obtained from biomethanation) fueled SOFC is studied by G. E. Marnellos et al (10), and an improved understanding of the involved physical, electrical, and chemical processes was given. P. Aguiar et al (11) modeling is helpful (13-17). The model used in this study was first built by Qu et al (17,18) by adopting a three-dimensional modeling approach in which heat sources are derived from the methane steam reforming reaction and the water-gas shift reaction (14-17).Relatively few studies on the internal reforming reaction in SOFCs with Ni-GDC anodes have been published (1,9,19). The internal reforming of methane on Ni/CGO and Ni/YSZ anodes was investigated by H. Timmermann et al (9) with single cells operated at steam to carbon ratios from 0 to 3 (800 ºC to 950 ºC). With the Ni-CGO anode, the reaction order for methane was 1.19 under this operation regime, and the apparent activation energy was observed to be 26.3 kJ/mol. A one-dimensional model was used to describe the gas composition along the gas channel of the Ni-CGO anode. However, most of the reported kinetic st...

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“…3. Methane concentration decreases rapidly because the reaction can happen much faster when the activation energy is within a certain range (14). As shown in Fig.…”

Section: Predicted Cell Performance With Different Reforming Kineticsmentioning

confidence: 94%

Section: Predicted Cell Performance With Different Reforming Kineticsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Kinetics of Internal Methane Steam Reforming in Solid Oxide Fuel Cells and Its Influence on Cell Performance– Coupling Experiments and Modeling

et al. 2013

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“…C-H-O ternary equilibrium diagram and carbon formation activity [27,[30][31][32] are often employed to investigate carbon deposition qualitatively, but they can only predict the possibility of carbon deposition. Since the deposited carbon is the product of the reforming reaction which is complexly coupled with the mass transport and electrochemical reaction in the anode and the reforming reaction is a heterogeneous catalytic chemical reaction, the elementary reaction kinetic model is usually adopted to investigate carbon deposition quantitatively [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Lattice Boltzmann modeling of carbon deposition in porous anode of a solid oxide fuel cell with internal reforming

Han

Dong

2016

Applied Energy

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h i g h l i g h t sPore scale LB model is built for gas transfer and reaction in anode fed by methane. Local distributions of both position and amount of carbon deposition are presented. Anode microstructure and carbon deposition are correlated. Effect of heterogeneity of anode microstructure on carbon deposition is studied. Strategies for suppressing carbon deposition are obtained and analyzed. a b s t r a c tA pore scale Lattice Boltzmann (LB) model is developed for multi-component mass transport and carbon deposition in the porous anode of a solid oxide fuel cell (SOFC) fed with methane. In this model, the reforming and electrochemical reactions are discretely coupled via local molar fluxes of reactive gas species at catalytically active sites and triple phase boundaries (TPBs). By considering the heterogeneity of anode microstructure, the present pore scale LB model is capable of quantitatively predicting the local distributions of both the position and the amount of deposited carbon in the irregular porous anode. Using this model, the characteristics of carbon deposition in the anode are investigated. It is found that the heterogeneity of anode microstructure has significant influence on mass transport and carbon deposition. Increasing the pre-reforming extent of methane and decreasing the operating temperature are beneficial for the suppression of carbon deposition, whereas they will cause a relatively inferior cell performance. The LB model and results presented in this study are beneficial to mechanism investigation of carbon deposition. Furthermore, they are also helpful for studying the correlations between anode microstructure and carbon deposition and then bridging the manufacture of SOFC electrodes and their performance, which is useful to propose effective suggestions for avoiding performance degradation of SOFC induced by carbon deposition.

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Thermoeconomic analysis and multi‐objective optimization of a solid‐oxide fuel cell plant coupled with methane tri‐reforming: Effects of thermochemical recuperation

et al. 2021

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Summary An 80‐kW solid‐oxide fuel cell (SOFC)‐based power plant coupled with methane tri‐reforming is proposed and analyzed from the viewpoint of thermoeconomics. In order to integrate the SOFC power generation section with the external reformer, part of the exhaust gases from the afterburner is recycled and utilized as a reformer agent in the reactor. The main challenge in performing the economic analysis is the determination of the costs associated with the tri‐reforming process, in particular the reactor cost. To accomplish this, a mathematical procedure is suggested and applied for a fixed‐bed reactor based on both the chemical equilibrium and chemical kinetics describing the tri‐reforming process. The effects on system performance of important design parameters, including current density, SOFC operating temperature, and exhaust gas recirculation (EGR) percentage, are investigated. The results indicate that system performance is enhanced by using lower values of current density and higher values of SOFC operating temperature. In addition, considering the thermal and environmental performance of system as criteria, the use of EGR is not recommended. However, as the EGR percentage increases, the product unit cost decreases, making EGR advantageous from an economic perspective.

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Prediction of the performance of a solid oxide fuel cell fuelled with biosyngas: Influence of different steam-reforming reaction kinetic parameters

Cited by 27 publications

References 52 publications

Kinetics of Internal Methane Steam Reforming in Solid Oxide Fuel Cells and Its Influence on Cell Performance– Coupling Experiments and Modeling

Kinetics of Internal Methane Steam Reforming in Solid Oxide Fuel Cells and Its Influence on Cell Performance– Coupling Experiments and Modeling

Lattice Boltzmann modeling of carbon deposition in porous anode of a solid oxide fuel cell with internal reforming

Thermoeconomic analysis and multi‐objective optimization of a solid‐oxide fuel cell plant coupled with methane tri‐reforming: Effects of thermochemical recuperation

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