Study of Methane Steam Reforming kinetics in operating Solid Oxide Fuel Cells: Influence of current density

Fan, Limin; Biert, Lindert van; Thattai, A. Thallam; Verkooijen, A.H.M.; Aravind, P.V.

doi:10.1016/j.ijhydene.2015.02.096

Cited by 29 publications

(44 citation statements)

References 40 publications

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“…The value of S/C ratio depends on the composition of the NG mixture supplied to the system. Typical values for the S/C ratio are in the range of 1.5 to 2.5 , . For the current study an S/C ratio of 2.2 is used.…”

Section: Plant Description Steady State Modeling and Selected Layoutmentioning

confidence: 99%

Design of a Pilot SOFC System for the Combined Production of Hydrogen and Electricity under Refueling Station Requirements

et al. 2019

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The objective of the current work is to support the design of a pilot hydrogen and electricity producing plant that uses natural gas (or biomethane) as raw material, as a transition option towards a 100% renewable transportation system. The plant, with a solid oxide fuel cell (SOFC) as principal technology, is intended to be the main unit of an electric vehicle station. The refueling station has to work at different operation periods characterized by the hydrogen demand and the electricity needed for supply and self‐consumption. The same set of heat exchangers has to satisfy the heating and cooling needs of the different operation periods. In order to optimize the operating variables of the pilot plant and to provide the best heat exchanger network, the applied methodology follows a systematic procedure for multi‐objective, i.e. maximum plant efficiency and minimum number of heat exchanger matches, and multi‐period optimization. The solving strategy combines process flow modeling in steady state, superstructure‐based mathematical programming and the use of an evolutionary‐based algorithm for optimization. The results show that the plant can reach a daily weighted efficiency exceeding 60%, up to 80% when considering heat utilization.

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Section: Plant Description Steady State Modeling and Selected Layoutmentioning

confidence: 99%

Design of a Pilot SOFC System for the Combined Production of Hydrogen and Electricity under Refueling Station Requirements

et al. 2019

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“…The additional oxygen ions can promote the catalytic activity of the anode. With an applied current density of 60-100 mA/cm 2 on Ni-GDC anodes, Fan et al reported decreased activation energies for methane steam reforming [54].…”

Section: Effect Of Current Densities On Tar Conversionmentioning

confidence: 99%

“…With an applied current density of 60–100 mA/cm 2 on Ni‐GDC anodes, Fan et al. reported decreased activation energies for methane steam reforming .…”

Section: Literature Review Of Experimental Investigations Of Tar Convmentioning

confidence: 99%

Conversion of tars on solid oxide fuel cell anodes and its impact on voltages and current densities

Herrmann

Dillig

Hauth

et al. 2017

Energy Science & Engineering

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This paper focuses on tar conversion on solid oxide fuel cell (SOFC) anodes and its consequences for operation performance and degradation issues. Based on an extensive literature review it discusses the chemical behavior of tar species in typical gas environments/operation conditions at the Nickel anode and describes an experimental investigation methodology. A numerical 1-D discretized cell model is developed that represents global tar conversion kinetics on SOFC anodes based on an Arrhenius power law approach. This permits the determination of the apparent kinetic rate constants based on simple OCV measurements at cells operated on tar-laden gases. The approach is applied and verified with measurement data from literature. Resulting conversion rate constants varied with the investigated tar species (naphthalene, toluene) and the operation temperature (800-900°C) in the range 0.1-1.04 mol/sec/m 2 /bar. The results showed good consistency within varying tar concentration levels and with FID measurement in the off gas of the SOFC anodes. 195

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“…In addition, the interaction of the electrochemical reactions and the reforming reaction is essential in understanding the influence of the current density on the catalytic activity. The authors of this study have reported that the electrochemical reaction has a slightly positive influence on the MSR reaction rate on Nickel-Gadolinium Doped Ceria (Ni-GDC) anodes [27]. Thallam Thattai et al have reported a large dependence of the reaction orders in the Power-Law kinetic model and exponents in the Langmuir-Hinshelwood kinetic model on the local current density, and both kinetic models show that the electrochemical reaction promotes the MSR reaction [28].…”

Section: Introductionmentioning

confidence: 99%

Methane steam reforming reaction in solid oxide fuel cells: Influence of electrochemical reaction and anode thickness

Fan

Mokhov

Saadabadi

et al. 2021

Journal of Power Sources

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Study of Methane Steam Reforming kinetics in operating Solid Oxide Fuel Cells: Influence of current density

Cited by 29 publications

References 40 publications

Design of a Pilot SOFC System for the Combined Production of Hydrogen and Electricity under Refueling Station Requirements

Design of a Pilot SOFC System for the Combined Production of Hydrogen and Electricity under Refueling Station Requirements

Conversion of tars on solid oxide fuel cell anodes and its impact on voltages and current densities

Methane steam reforming reaction in solid oxide fuel cells: Influence of electrochemical reaction and anode thickness

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