High-performing electrolyte-supported symmetrical solid oxide electrolysis cells operating under steam electrolysis and co-electrolysis modes

Bernadet, Lucile; Moncasi, Carlos; Torrell, Marc; Tarancón, Albert

doi:10.1016/j.ijhydene.2020.03.144

Cited by 71 publications

(54 citation statements)

References 61 publications

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“…The simulation is developed under the assumption of thermo-neutral conditions [54,64,79]; • at the cathode outlet of the stack, there is always a mixture of steam and hydrogen because the steam conversion in the stack is lower than 100%, therefore the yield of conversion of steam into hydrogen is fixed at 75% [54,64]; • SOEC is supposed as an isothermal steady-state system [54,62,80]; • a fraction of the cathode outlet flow is recirculated to the cathode inlet in order to exploit the hydrogen capacity of counteracting undesired oxidation of the electrodes by the action of pure steam and to preheat the fresh inlet stream [45,54,62,81,82]; • at the cathode, the flash unit is fed with steam and recycled hydrogen. At the anode, the formation of oxygen is ensured by the recombination of the oxide anions, produced on the cathode and transported through the solid electrolyte [50,83]; and • perfect thermal insulation on the stack is considered and heat losses toward the environment are neglected [54].…”

Section: Soec Electrolysismentioning

confidence: 99%

Renewable Hydrogen Production Processes for the Off-Gas Valorization in Integrated Steelworks through Hydrogen Intensified Methane and Methanol Syntheses

Zaccara

Petrucciani

Matino

et al. 2020

Metals

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Within integrated steelmaking industries significant research efforts are devoted to the efficient use of resources and the reduction of CO2 emissions. Integrated steelworks consume a considerable quantity of raw materials and produce a high amount of by-products, such as off-gases, currently used for the internal production of heat, steam or electricity. These off-gases can be further valorized as feedstock for methane and methanol syntheses, but their hydrogen content is often inadequate to reach high conversions in synthesis processes. The addition of hydrogen is fundamental and a suitable hydrogen production process must be selected to obtain advantages in process economy and sustainability. This paper presents a comparative analysis of different hydrogen production processes from renewable energy, namely polymer electrolyte membrane electrolysis, solid oxide electrolyze cell electrolysis, and biomass gasification. Aspen Plus® V11-based models were developed, and simulations were conducted for sensitivity analyses to acquire useful information related to the process behavior. Advantages and disadvantages for each considered process were highlighted. In addition, the integration of the analyzed hydrogen production methods with methane and methanol syntheses is analyzed through further Aspen Plus®-based simulations. The pros and cons of the different hydrogen production options coupled with methane and methanol syntheses included in steelmaking industries are analyzed.

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Section: Soec Electrolysismentioning

confidence: 99%

Renewable Hydrogen Production Processes for the Off-Gas Valorization in Integrated Steelworks through Hydrogen Intensified Methane and Methanol Syntheses

Zaccara

Petrucciani

Matino

et al. 2020

Metals

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“…Symmetrical solid oxide cells configuration has also been evaluated, in which Sr 2 Fe 1.5 Mo 0.5 O 6-δ electrodes are deposited on both sides of YbScSZ tapes previously coated with a Ce 1-x Gd x O 1.9 [185]. This configuration has shown some advantages such as a reduction of sintering steps or a better thermomechanical compatibility between the electrodes and the electrolyte.…”

Section: Solid Oxide Electrolysis Cellsmentioning

confidence: 99%

Main Hydrogen Production Processes: An Overview

et al. 2021

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Due to its characteristics, hydrogen is considered the energy carrier of the future. Its use as a fuel generates reduced pollution, as if burned it almost exclusively produces water vapor. Hydrogen can be produced from numerous sources, both of fossil and renewable origin, and with as many production processes, which can use renewable or non-renewable energy sources. To achieve carbon neutrality, the sources must necessarily be renewable, and the production processes themselves must use renewable energy sources. In this review article the main characteristics of the most used hydrogen production methods are summarized, mainly focusing on renewable feedstocks, furthermore a series of relevant articles published in the last year, are reviewed. The production methods are grouped according to the type of energy they use; and at the end of each section the strengths and limitations of the processes are highlighted. The conclusions compare the main characteristics of the production processes studied and contextualize their possible use.

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“…However, one major drawback of using Ni-YSZ cermet is poor redox stability under high steam content, which leads to microstructural coarsening and electrode delamination. An alternative material, which fulfills the requirement of high redox stability, is perovskite material [21][22][23][24], such as La 1-x Sr x Cr 1-x Mn x O 3 (LSCM) of which its redox property stems from the creation of Mn 3+ /Cr 3+ and Mn 4+ /Cr 2+ redox couples. Chen et al [25] prepared the threeelectrode configuration cell using LSCM-YSZ composite as the cathode.…”

Section: Materials Selectionmentioning

confidence: 99%