Durable SOC stacks for production of hydrogen and synthesis gas by high temperature electrolysis

Ebbesen, Sune Dalgaard; Høgh, Jens Valdemar Thorvald; Agersted, Karsten; Nielsen, Jens Frederik Dalsgaard; Mogensen, Mogens Bjerg

doi:10.1016/j.ijhydene.2011.03.130

Cited by 170 publications

(122 citation statements)

References 26 publications

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“…In addition to steam electrolysis, SOECs can be used to electrolyze CO 2 for CO and O 2 production [33][34][35][36][37][38][39]. Co-electrolysis of CO 2 and H 2 O has also been demonstrated to be feasible for simultaneous production of H 2 and CO [33][34][35][36][37][38][39][40][41][42][43][44], which can be subsequently processed for synthetic fuel production.…”

Section: Introductionmentioning

confidence: 99%

“…Co-electrolysis of CO 2 and H 2 O has also been demonstrated to be feasible for simultaneous production of H 2 and CO [33][34][35][36][37][38][39][40][41][42][43][44], which can be subsequently processed for synthetic fuel production. In an SOEC used for H 2 O/CO 2 co-electrolysis, 3 reactions take place simultaneously, namely H 2 O electrolysis, CO 2 electrolysis, and reversible water gas shift reaction (WGSR).…”

Section: Introductionmentioning

confidence: 99%

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An electrochemical model for syngas production by co-electrolysis of H2O and CO2

2012

Journal of Power Sources

163

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Co-electrolysis of CO 2 and H 2 O in a solid oxide electrolyzer cell (SOEC) offers a promising way for syngas production. In this study, an electrochemical model is developed to simulate the performance of an SOEC used for CO 2 /H 2 O co-electrolysis, considering the reversible water gas shift reaction (WGSR) in the cathode. The dusty gas model (DGM) is used to characterize the multi-component mass transport in the electrodes. The modeling results are compared with experimental data from the literature and good agreement is observed. Parametric simulations are performed to analyze the distributions of WGSR and gas composition in the electrode. A new method is proposed to quantify the contribution of WGSR to CO production by comparing the CO fluxes at the cathode-electrolyte interface and at the cathode surface. It is found that the reversible WGSR could contribute to CO production at a low operating potential but consume CO at a high operating potential. In addition, the contribution of WGSR to CO production also depends on the operating temperature and inlet gas composition.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An electrochemical model for syngas production by co-electrolysis of H2O and CO2

2012

Journal of Power Sources

163

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“…[1][2][3] Research in this non-fossil-based energy storage technology has gradually been intensified during the last two decades due to the recent high oil prices and the increasing climate challenges. SOC stacks generally perform worse and degrade faster than single cells, 3 but some stacks from Topsoe Fuel Cell (TOFC) [4][5][6] and Ceramatec 7 have shown similar durability as single cells 8 and button cells 9 when operated at electrolysis current density less than ∼1 A cm −2 . Pressurized operation of SOEC stacks is expected to increase the conversion efficiency by 3 to 5% and reduce auxiliary component costs.…”

mentioning

confidence: 99%

Characterization of a Planar Solid Oxide Cell Stack Operated at Elevated Pressure

Jensen

Graves

Chen

et al. 2016

J. Electrochem. Soc.

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As global and local energy production becomes more dependent on intermittent renewable sources like wind and solar, efficient and reversible conversion of electricity to storable fuels becomes increasingly important. Solid oxide cells (SOCs) are interesting in this context since they can be operated either as electrolyzers (SOEC) to convert electricity to fuels such as hydrogen or methane, and as fuel cells (SOFC) to convert fuels to electricity. Both productivity and conversion efficiency can be improved if the SOC operation pressure can be increased from ambient pressure to 10-30 bar. In this paper we characterize an SOC stack operated at pressures from ambient pressure to 10 bar. The pressure dependency of stack temperature, cell area specific resistance (ASR), current-voltage (iV) curves, stack impedance spectra and pressure drop across the stack and heat exchangers is analyzed in this paper. Additionally, the expected impact on the hydrogen production efficiency and cost is discussed.

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“…The technology has been demonstrated with cell stacks of kW size (9,14,21,22). The company Topsoe Fuel Cell A/S is producing such stacks in Denmark.…”

Section: Solid Oxide Electrolysis Cellmentioning

confidence: 99%

(Invited) Electrochemical Routes towards Sustainable Hydrocarbon Fuels

Mogensen

2012

ECS Trans.

Self Cite

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The potential of renewable energy and possible solution to the intermittency problem of renewable energy sources like sun and wind are explained. The densest storage of energy is in the form of hydrocarbons. The most suitable method of conversion and storage within a foreseeable future is electrolysis followed by conversion into synthetic hydrocarbons, alcohols or ethers. Several types of electrolysers exist. The various types are listed together with a short description of principle and status. It is argued that electrolysis will at least become part of large sustainable energy systems in the future. In spite of this, it is important to research and develop as many viable sustainable energy technologies as economical possible.

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Durable SOC stacks for production of hydrogen and synthesis gas by high temperature electrolysis

Cited by 170 publications

References 26 publications

An electrochemical model for syngas production by co-electrolysis of H2O and CO2

An electrochemical model for syngas production by co-electrolysis of H2O and CO2

Characterization of a Planar Solid Oxide Cell Stack Operated at Elevated Pressure

(Invited) Electrochemical Routes towards Sustainable Hydrocarbon Fuels

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