Hydrogen and synthetic fuel production from renewable energy sources

Jensen, Søren Højgaard; Larsen, Peter H.; Mogensen, Mogens Bjerg

doi:10.1016/j.ijhydene.2007.04.042

Cited by 494 publications

(277 citation statements)

References 7 publications

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“…Jensen et al proposed to use SOEC to produce Fischer-Tropsch fuels either using atmospheric or pressurized cells [18,19]. Similar results were published by Becker et al [20], and by Kazempoor and Braun [21], whereas Cinti et al [22] applied co-electrolysis to investigate the eventual convenience of distributed CO and hydrogen production and centralized F-T fuel synthesis.…”

Section: Introductionmentioning

confidence: 76%

Potential of Reversible Solid Oxide Cells as Electricity Storage System

Giorgio

Desideri

2016

Energies

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Electrical energy storage (EES) systems allow shifting the time of electric power generation from that of consumption, and they are expected to play a major role in future electric grids where the share of intermittent renewable energy systems (RES), and especially solar and wind power plants, is planned to increase. No commercially available technology complies with all the required specifications for an efficient and reliable EES system. Reversible solid oxide cells (ReSOC) working in both fuel cell and electrolysis modes could be a cost effective and highly efficient EES, but are not yet ready for the market. In fact, using the system in fuel cell mode produces high temperature heat that can be recovered during electrolysis, when a heat source is necessary. Before ReSOCs can be used as EES systems, many problems have to be solved. This paper presents a new ReSOC concept, where the thermal energy produced during fuel cell mode is stored as sensible or latent heat, respectively, in a high density and high specific heat material and in a phase change material (PCM) and used during electrolysis operation. The study of two different storage concepts is performed using a lumped parameters ReSOC stack model coupled with a suitable balance of plant. The optimal roundtrip efficiency calculated for both of the configurations studied is not far from 70% and results from a trade-off between the stack roundtrip efficiency and the energy consumed by the auxiliary power systems.

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Section: Introductionmentioning

confidence: 76%

Potential of Reversible Solid Oxide Cells as Electricity Storage System

Giorgio

Desideri

2016

Energies

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“…Solid-oxide electrolysis cell (SOEC) in which a reverse operation of a solid-oxide fuel cell (SOFC) proceeds has a possibility for the electrolysis. 5) SOEC has been discussed for the production of a syngas, which is a mixture of H 2 and CO generated from n i is the mole number of migrated electrons in a reaction. DG i corresponds to the electrical energy for electrolysis.…”

Section: Co 2 Electrolysismentioning

confidence: 99%

Carbon Recycling for Reduction of Carbon Dioxide Emission from Iron-making Process

Kato

2010

ISIJ Int.

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“…A combination of favourable thermodynamics and kinetics at high temperatures (500-1000°C) offers reduced electrical energy consumption per unit of hydrogen compared to low temperature water electrolysis, and thus may provide a cost-effective route to hydrogen production. This approach is particularly advantageous if a high temperature electrolyser may be simply and efficiently coupled to a source of renewable solar [3,4], geothermal [5,6], wind [4] or nuclear [7] electrical energies, to produce carbon-free hydrogen.…”

Section: Introductionmentioning

confidence: 99%

Modelling the dynamic response of a solid oxide steam electrolyser to transient inputs during renewable hydrogen production

Cai

Brandon

Adjiman

2010

Front. Energy Power Eng. China

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Hydrogen is regarded as a leading candidate for alternative future fuels. Solid oxide electrolyser cells (SOEC) may provide a cost-effective and green route to hydrogen production especially when coupled to a source of renewable electrical energy. Developing an understanding of the response of the SOEC stack to transient events that may occur during its operation with intermittent electricity input is essential before the realisation of this technology. In this paper, a one-dimensional (1D) dynamic model of a planar SOEC stack has been employed to study the dynamic behaviour of such an SOEC and the prospect for stack temperature control through variation of the air flow rate.Step changes in the average current density from 1.0 to 0.75, 0.5 and 0.2 A/cm 2 have been imposed on the stacks, replicating the situation in which changes in the supply of input electrical energy are experienced, or the sudden switch-off of the stack. Such simulations have been performed both for open-loop and closed-loop cases. The stack temperature and cell voltage are decreased by step changes in the average current density. Without temperature control via variation of the air flow rate, a sudden fall of the temperature and the cell potential occurs during all the step changes in average current density. The temperature excursions between the initial and final steady states are observed to be reduced by the manipulation of the air flow rate. Provided that the change in the average current density does not result in a transition from exothermic to endothermic operation of the SOEC, the use of the air flow rate to maintain a constant steady-state temperature is found to be successful.

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Hydrogen and synthetic fuel production from renewable energy sources

Cited by 494 publications

References 7 publications

Potential of Reversible Solid Oxide Cells as Electricity Storage System

Potential of Reversible Solid Oxide Cells as Electricity Storage System

Carbon Recycling for Reduction of Carbon Dioxide Emission from Iron-making Process

Modelling the dynamic response of a solid oxide steam electrolyser to transient inputs during renewable hydrogen production

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