Status of Solid Oxide Fuel Cell Development at Elcogen

Noponen, Matti; Torri, P.; Göös, Jukka; Chade, Daniel; Hallanoro, Paul; Temmo, Aleksander; Koit, Andre; Õunpuu, Enn

doi:10.1149/06801.0151ecst

Cited by 23 publications

(11 citation statements)

References 2 publications

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“…In G2P mode, the BOP components affect the system efficiency negatively. This was not the case in the previous studies [16,17], where the BOP hardware influenced negatively the plant efficiency in P2G mode, while the effect in G2P mode depended on the UF 12 . The modelling study revealed that it was possible to raise the SOC operating temperature from 650 °C assumed in previous studies [16,17] to 700 °C without having to increase the pressure.…”

Section: Discussioncontrasting

confidence: 78%

“…This is highly relevant, as state of the art SOC systems operate at ~750 °C [11,42]. The operating temperature of the system is therefore varied from 650 °C to 750 °C [10][11][12]. In this case, the H/C ratio is set to the minimum value required to avoid carbon formation inside the SOC (Figure 2(b)).…”

Section: Changing the Operating Temperature Of The Socmentioning

confidence: 99%

“…Pressurized SOCs with internal methanation used for ES constitute a relatively new concept, still far from being commercialized as e.g. steam electrolysis [10][11][12] or CO 2 -electrolysis [13] and characterized by a number of technical challenges to be addressed before a successful implementation [14]. However the concept has been analyzed in previous studies [15][16][17][18], as they are characterized by high efficiency and cost-effectiveness on large-scale [17].…”

Section: Introductionmentioning

confidence: 99%

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A novel system for large-scale storage of electricity as synthetic natural gas using reversible pressurized solid oxide cells

Butera

Jensen

Clausen

2019

Energy

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The ongoing reduction of greenhouse gas emissions entails increased use of intermittent renewable energy technologies such as wind and solar. This raises the need for costeffective and efficient electricity storage. In particular seasonal variations in supply and demand will require tremendous storage capacity. In this paper we present a truly largescale electricity storage system which uses pressurized reversible solid oxide cells combined with catalytic reactors to store electricity as synthetic natural gas. By storing the produced gas in existing natural gas grids the system can create a strong and efficient link between the electricity and gas markets. In addition, the system is able to operate reversibly using gas from the grid to satisfy the electric power demand. The system performance is analyzed with a component-based thermodynamic modeling tool which shows that electricity can be stored as synthetic natural gas with an energy efficiency of 89%. The gas to electricity efficiency is equally high, resulting in a round-trip storage efficiency of 80% (DC-to-DC).

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Section: Discussioncontrasting

confidence: 78%

Section: Changing the Operating Temperature Of The Socmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A novel system for large-scale storage of electricity as synthetic natural gas using reversible pressurized solid oxide cells

Butera

Jensen

Clausen

2019

Energy

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“…z-direction). This anisotropy of the substrate could be related to its manufacturing method by tape casting [64] that induces a privileged orientation as discussed in [65].…”

Section: Reconstructions and Microstructural Characterizationmentioning

confidence: 99%

Particle-based model for functional and diffusion layers of solid oxide cells electrodes

Moussaoui¹,

Debayle²,

Gavet³

et al. 2020

Powder Technology

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Highlights • Novel particle-based model development for Solid Oxide Cell electrodes microstructure • Model adaption for the functional and current collecting layers • Synthetic microstructures morphological and physical validation on 3D reconstructions • Representativeness checked on synchrotron X-ray and FIB-SEM reconstructions • Fine quantification of the different porosity length-scales within the substrate Abstract. A novel particle-based model is proposed to generate synthetic yet representative 3D microstructures of typical SOC electrodes. The model steps can be related to the real electrode manufacturing routes, classically via powders processing, making it a practical tool for electrodes design optimization. The representativeness of the synthetic microstructures is checked on several two-phase (LSCF, LSC) and threephase (Ni-YSZ) electrodes reconstructed by synchrotron X-ray and FIB-SEM tomography. The validation shows a very good agreement between the real and synthetic media in terms of metric, topological and physical properties. Furthermore, the model is adapted to simulate the microstructure of a typical Ni-YSZ current collecting layer by taking into account a bimodal pore-size-distribution. In this objective, the macro-pores resulting from the burning-off of specific pore-formers are morphologically separated in the reconstruction from the micro-porosity network. Finally, the geometrical features of the macro-pores are meticulously characterized and successfully emulated by using parametric ellipsoids.

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“…Due to the conduction of oxide ions (O 2− ) through an electrolyte and the occurrence of electrochemical oxidation in an anode at high temperature above 600 °C, SOFCs can, in principle, directly use not only hydrogen but also hydrocarbon and alcohol fuels. Since 2011, Kyocera has successfully commercialized residential combined heat/power systems using flatten‐tubular anode‐supported SOFCs ; other manufacturers are also developing stationary SOFC systems using planar and tubular SOFCs . These systems have an external steam reformer to convert natural gas to hydrogen in advance.…”

Section: Introductionmentioning

confidence: 72%

Internal Partial Oxidation Reforming of Butane and Steam Reforming of Ethanol for Anode‐supported Microtubular Solid Oxide Fuel Cells

et al. 2017

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Internal partial oxidation reforming of butane and steam reforming of ethanol were investigated using microtubular solid oxide fuel cells (SOFCs) supported on nickel‐gadolinia doped ceria (Ni‐GDC) anodes for portable power sources in emergency situations and for mobilities, such as vehicles, robots and drones. At an oxygen/carbon (O/C) ratio of 1.0, which is a coking condition in the equilibrium, the Ni‐GDC anode deteriorated for 28 h by internal partial oxidation of butane at 650 °C. However, power generation was also impossible after 8 h and 79 h at steam/carbon (S/C) = 1.0 and 1.5, respectively, by internal steam reforming of ethanol despite of no carbon deposition condition in the equilibrium at 650 °C. Power can be generated for more than 100 h at O/C = 1.5 in butane and at S/C = 2.0 in ethanol. For internal partial oxidation reforming of methane and steam reforming of ethanol in SOFCs, the O/C and S/C ratios are significantly important to prevent carbon deposition on the Ni‐GDC anode.

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Status of Solid Oxide Fuel Cell Development at Elcogen

Cited by 23 publications

References 2 publications

A novel system for large-scale storage of electricity as synthetic natural gas using reversible pressurized solid oxide cells

A novel system for large-scale storage of electricity as synthetic natural gas using reversible pressurized solid oxide cells

Particle-based model for functional and diffusion layers of solid oxide cells electrodes

Internal Partial Oxidation Reforming of Butane and Steam Reforming of Ethanol for Anode‐supported Microtubular Solid Oxide Fuel Cells

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