Effects of coal syngas and H2S on the performance of solid oxide fuel cells

Márquez, Andrés; Ohrn, T.R.; Trembly, Jason; Ingram, David C.; Bayless, David J.

doi:10.1016/j.jpowsour.2006.10.102

Cited by 47 publications

(20 citation statements)

References 35 publications

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“…Equations (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19) can be used to predict the effective properties of the composite electrode using the mono-particle size distribution of each type of material. Equations (20)(21)(22)(23)(24)(25)(26)(27)(28)(29) can be used to predict the effective properties of the composite electrode using the poly-dispersed particle sizes.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the validity of Equation (2) has been tested by comparing the calculated results with computer simulated results [11,15].…”

Section: Coordination Number Theorymentioning

confidence: 99%

“…The planar solid oxide fuel cell (SOFC) is one of the promising power generation devices with many favorable properties, such as high electrical conversion efficiency, fuel flexibility, compactness, and low emission [1,2]. Figure 1 shows a typical planar SOFC unit with seven distinct layers: (a) interconnect at anode side for the fuel distribution and electric current collection, (b) the porous composite anode support, (c) the composite anode inter-layer, (d) the dense YSZ electrolyte, (e) the composite cathode inter-layer, (f) the porous cathode current collector and the interconnect at the cathode side for the air distribution and electric current collecting.…”

Section: Introductionmentioning

confidence: 99%

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Percolation Theory in Solid Oxide Fuel Cell Composite Electrodes with a Mixed Electronic and Ionic Conductor

Chen

Zhang

et al. 2013

Energies

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Percolation theory is generalized to predict the effective properties of specific solid oxide fuel cell composite electrodes, which consist of a pure ion conducting material (e.g., YSZ or GDC) and a mixed electron and ion conducting material (e.g., LSCF, LSCM or CeO 2 ). The investigated properties include the probabilities of an LSCF particle belonging to the electron and ion conducting paths, percolated three-phase-boundary electrochemical reaction sites, which are based on different assumptions, the exposed LSCF surface electrochemical reaction sites and the revised expressions for the inter-particle ionic conductivities among LSCF and YSZ materials. The effects of the microstructure parameters, such as the volume fraction of the LSCF material, the particle size distributions of both the LSCF and YSZ materials (i.e., the mean particle radii and the non-dimensional standard deviations, which represent the particle size distributions) and the porosity are studied. Finally, all of the calculated results are presented in non-dimensional forms to provide generality for practical application. Based on these results, the relevant properties can be easily evaluated, and the microstructure parameters and intrinsic properties of each material are specified.Keywords: solid oxide fuel cell; percolation theory; mixed electron and ion conductor; LSCF; coordination number; three-phase-boundary sites; electrochemically active sites

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Section: Resultsmentioning

confidence: 99%

“…Furthermore, the validity of Equation (2) has been tested by comparing the calculated results with computer simulated results [11,15].…”

Section: Coordination Number Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Percolation Theory in Solid Oxide Fuel Cell Composite Electrodes with a Mixed Electronic and Ionic Conductor

Chen

Zhang

et al. 2013

Energies

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“…However, this low amount of H 2 at the input to the fuel cell can also be thought to represent the fuel mixture found in coal syngas [20]. With 90% fuel consumption, a fuel mixture of 20% H 2 and 3% H 2 O, balance N 2, provides the output of 2% H 2 and 21% H 2 O, balance N 2 .…”

Section: Bounds Of Practical Fuel Cell Operationmentioning

confidence: 99%

Thermodynamic predictions of the impact of fuel composition on the propensity of sulphur to interact with Ni and ceria-based anodes for solid oxide fuel cells

Lohsoontorn

Brett

Brandon

2008

Journal of Power Sources

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“…Although these present cleanup processes are capable of removing H 2 S, halide and particulate matter to very low levels, these processes are carried out at ambient temperature, thereby removing a significant portion of the syngas thermal energy [3]. The US DOE is currently working on the development of warm gas cleanup systems that will allow the removal of H 2 S, HCN, HCl, particulate matter and alkali species from coal syngas at temperatures of 250-500 • C [1, 3,9] The impact of major impurities, such as sulfur and carbon on the Ni-YSZ anode has been studied by researchers and the results are available in the literature [10][11][12]. However, the shortterm and long-term effects of trace impurities (As and P) on the SOFC performance are still unclear.…”

mentioning

confidence: 99%