Economics and potential application of electrolytic hydrogen in the next decades

Dönitz, W.

doi:10.1016/0360-3199(84)90136-8

Cited by 16 publications

(6 citation statements)

References 2 publications

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“…All rights reserved. The combination of SOEC and concentrated solar technology was intensively investigated already in the past decades [94][95][96][97] and more recently. [98][99][100][101][102] These recent works provide a solid experimental evidence for the concept, showing that operating SOEC with solar heat is feasible and promising.…”

Section: Angewandte Chemiementioning

confidence: 99%

“…[88][89][90] In the electrolysis mode, syngas or carbon monoxide can be produced for subsequent chemical processes applying electricity and heat from solar power. [91][92][93] The combination of SOEC and concentrated solar technology was intensively investigated already in the past decades [94][95][96][97] and more recently. [98][99][100][101][102] These recent works provide a solid experimental evidence for the concept, showing that operating SOEC with solar heat is feasible and promising.…”

Section: Solid Oxide Cell Based Water Electrolysismentioning

confidence: 99%

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Technological Pathways to Produce Compressed and Highly Pure Hydrogen from Solar Power

et al. 2023

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Übersetzung wird gemeinsam mit der endgültigen englischen Fassung erscheinen. Die endgültige englische Fassung (Version of Record) wird ehestmöglich nach dem Redigieren und einem Korrekturgang als Early-View-Beitrag erscheinen und kann sich naturgemäß von der AA-Fassung unterscheiden. Leser sollten daher die endgültige Fassung, sobald sie veröffentlicht ist, verwenden. Für die AA-Fassung trägt der Autor die alleinige Verantwortung.

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Section: Angewandte Chemiementioning

confidence: 99%

Section: Solid Oxide Cell Based Water Electrolysismentioning

confidence: 99%

Technological Pathways to Produce Compressed and Highly Pure Hydrogen from Solar Power

et al. 2023

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“…[88][89][90] Bei der Elektrolyse kann mit Hilfe von Strom und Wärme aus Sonnenenergie Synthesegas oder Kohlenmonoxid für nachfolgende chemische Prozesse erzeugt werden. [91][92][93] Die Kombination von SOEC und konzentrierter Solartechnik wurde bereits in den vergangenen Jahrzehnten [94][95][96][97] und in letzter Zeit [98][99][100][101][102] intensiv untersucht. Die neueren Arbeiten liefern einen soliden experimentellen Nachweis für das Konzept und zeigen, dass der Betrieb von SOEC mit Solarwärme machbar und vielversprechend ist.…”

Section: Wasserelektrolyse Mit Festoxidzellenunclassified

Technologische Pfade für die Herstellung von komprimiertem und hochreinem Wasserstoff mit Hilfe von Sonnenenergie

et al. 2023

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“…11,12 More recent work on SOE and reversible solid oxide fuel cells has demonstrated high hydrogen production rates in these cells. [13][14][15][16][17] Direct electrolysis of water (or steam), however, is energy intensive.…”

mentioning

confidence: 99%

“…3,10 SOE devices, which employ an yttria stabilized zirconia (YSZ) ceramic electrolyte, were developed by Dornier Systems GmbH in Germany under the name HotELLY in the 1980's for commercial production of hydrogen by steam electrolysis. 11,12 More recent work on SOE and reversible solid oxide fuel cells has demonstrated high hydrogen production rates in these cells. [13][14][15][16][17] Direct electrolysis of water (or steam), however, is energy intensive.…”

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confidence: 99%

Steam-Carbon Fuel Cell Concept for Cogeneration of Hydrogen and Electrical Power

Alexander¹,

Mitchell²,

Gür

2011

J. Electrochem. Soc.

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This study describes and presents the results of a new electrochemical approach to co-production of hydrogen and electric power using a steam-carbon fuel cell, within which carbon-containing species are kept physically separate from the hydrogen stream by a solid oxide electrolyte membrane. The fuel cell used for this purpose consists of H 2 , H 2 O (g) /Pt/YSZ/Pt/C (s) ,CO,CO 2 and measurements are taken between 600 and 900 C. Peak electrical power generated at 900 C is 8 mW/cm 2 at a current density of 40.5 mA/ cm 2 corresponding to simultaneous production of carbon-free hydrogen at a rate of 354 g H 2 /m 2 day. Electrochemical behavior and cell loss mechanisms are studied using impedance spectroscopy in different cell arrangements operating in steam-carbon and air-carbon modes. Exchange current densities extracted from these measurements indicated activation energies of 80.3 6 7.9 kJ/ mol for oxygen reduction, 132 6 12 kJ/mol for CO oxidation, and 189 6 35 kJ/mol for steam reduction. These results indicate that steam reduction is the dominant loss mechanism with significant contribution from CO oxidation kinetics. Modeling results for the carbon bed indicate that a bed height of 7 mm is capable of supporting cell current densities of 700 mA/cm 2 at 85% effective char utilization, allowing for high performing steam-carbon fuel cells for the simultaneous production of hydrogen and electrical work. Hydrogen is a desirable fuel because it is both an effective energy carrier as well as a clean burning fuel with minimal impact on the environment. Unfortunately, hydrogen does not occur naturally, and must be generated from other sources. If widespread use of hydrogen is to be achieved, an efficient method for distributed hydrogen production is desired due to the cost and technical challenges posed by hydrogen transportation and storage.Currently, the majority of hydrogen production is performed centrally using steam reforming of methane, and to a lesser extent, coal. The fuel is reformed with steam and then undergoes the water-gas shift reaction to produce hydrogen. Unfortunately, this process produces a hydrogen stream that is contaminated by various carbonaceous species, and therefore requires expensive separation techniques to clean the gas. Carbon monoxide remnants in the hydrogen gas are of particular concern, as even trace amounts of CO in the hydrogen stream render the hydrogen product undesirable for catalytic processes due to CO poisoning. This is a critical problem especially for low temperature fuel cells. In addition, the reforming process is only economically feasible at large scales, requiring expensive storage and distribution of the hydrogen product to its point of use.A variety of alternative hydrogen production schemes that attempt to solve or avoid the limitations of reforming have been proposed. Thermal decomposition of steam into hydrogen and oxygen is one such option, but this reaction is thermodynamically uphill and energetically expensive. Another approach is the electrolysis of water in an e...

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Economics and potential application of electrolytic hydrogen in the next decades

Cited by 16 publications

References 2 publications

Technological Pathways to Produce Compressed and Highly Pure Hydrogen from Solar Power

Technological Pathways to Produce Compressed and Highly Pure Hydrogen from Solar Power

Technologische Pfade für die Herstellung von komprimiertem und hochreinem Wasserstoff mit Hilfe von Sonnenenergie

Steam-Carbon Fuel Cell Concept for Cogeneration of Hydrogen and Electrical Power

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