Power-to-Gas through thermal integration of high-temperature steam electrolysis and carbon dioxide methanation - Experimental results

Gruber, Manuel; Weinbrecht, Petra; Biffar, Linus; Harth, Stefan; Trimis, D.; Brabandt, Jörg; Posdziech, Oliver; Blumentritt, Robert

doi:10.1016/j.fuproc.2018.09.003

Cited by 81 publications

(41 citation statements)

References 15 publications

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“…In addition, reduction of the electricity consumed for preheating the airflow is feasible by reducing the airflow rate that is about 2.5 times higher than the steam flow. Finally, for a better efficiency of SOE systems, direct coupling with low grade steam or low grade excess heat sources for water evaporation can raise the system efficiency above 80% HHV AC making solid oxide electrolysis perfectly adapted for the industry sector , , .…”

Section: Discussionmentioning

confidence: 99%

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Solid Oxide Electrolyzer System Operational at the H₂ Refueling Station of Karlsruhe

et al. 2019

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The tenth H2 refueling station of the German federal state of Baden‐Württemberg was commissioned on September 6, 2017. The Karlsruhe H2 refueling station, located at the multi‐fuels station of Total, is the first one equipped with an onsite hydrogen production using a solid oxide electrolyzer (SOE) system. In the present work, details about the SOE system equipment are reported. Electrical consumption of the integrated stacks module (ISM) and the hot balance of plant (BoP) for steam generation and inlet gas pre‐heating, was monitored during 240 h of steady‐state operation under 100% steam. The average cell voltage of the 90 cells composing the ISM was 1.35 V at 0.4 A cm−2 current density. ISM efficiency was around 91.5% HHVAC considering 100% faradaic efficiency and including the conversion of the AC/DC power supply. Due to the consumption of the hot BoP and system auxiliaries for safety and control, achieved overall system efficiency was 61.4% HHVAC. Independently from electric steam production, around 10% reduction of the ISM electricity consumption could be feasible with the optimization of the inlet air flowrate. Indeed, adapting the inlet air flowrate as function of the outlet hydrogen flowrate would allow reducing the electricity need for inlet air pre‐heating.

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Section: Discussionmentioning

confidence: 99%

“…With a 5 ESCs short stack operated at –0.6 A cm −2 and 80% steam‐to‐hydrogen conversion rate (SC), voltage degradation amounted 20 mV per 1,000 h (∼1.5% kh −1 ) . At system level, the literature is mentioning only few steam electrolyzer systems operated in the field , none of them being dedicated for hydrogen refueling station.…”

Section: Introductionmentioning

confidence: 99%

Solid Oxide Electrolyzer System Operational at the H₂ Refueling Station of Karlsruhe

et al. 2019

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“…Dampf wird bei der SOEC nur einmal durch die Zelle geleitet, da im Gegensatz zu Niedertemperaturverfahren keine Trennung von Wasserstoff und Wasser erfolgt und eine Rückführung apparativ aufwendig wäre. Bestehende Systeme können jedoch Dampfkonversionsgrade von 80 % aufweisen . Wird der Dampfanteil von 20 % toleriert, kann das wasserstoffreiche Ausgangsgas der SOEC direkt in die katalytische Methanisierung gespeist werden.…”

Section: Prozesskettenentwicklungunclassified

“…Steht jedoch genügend Wind‐ oder Solarenergie zur Erzeugung von Wasserstoff zur Verfügung, kann theoretisch der gesamte Kohlenstoff als Kraftstoff nutzbar gemacht werden. Die innovative Kopplung von Hochtemperaturelektrolyse und thermochemischer Vergasung ermöglicht durch stoffliche und thermische Integration die optimale Nutzung bestehender Synergien . Erfüllt das produzierte Gas die geltenden Anforderungen, kann es ins Erdgasnetz eingespeist werden und ist als vollwertiges Substitut für fossiles Erdgas zu betrachten.…”

Section: Introductionunclassified

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CNG und LNG aus biogenen Reststoffen – ein Konzept zur ressourcenschonenden Kraftstoffproduktion

Müller

Anghilante

Schmid

et al. 2019

Chemie Ingenieur Technik

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Es wurde ein Verfahren entwickelt, das die Umwandlung von Reststoffen zu methanbasierten Kraftstoffen unter höchstmöglichem Erhalt des biogenen Kohlenstoffs mithilfe von elektrischer Energie aus erneuerbaren Quellen ermöglicht. Waldrestholz, Stroh und Klärschlamm wurden als besonders relevante Einsatzstoffe identifiziert. Durch die hochintegrierte Kopplung von Vergasung, Hochtemperaturelektrolyse und Methanisierung wird der biogene Kohlenstoff aus den Edukten nahezu vollständig in das Produkt Methan überführt. Die Gestehungskosten sind dabei mit denen gegenwärtig eingesetzter Technologien vergleichbar und liegen bei Großanlagen im Bereich üblicher Werte der Biomethanerzeugung.A highly integrated process for the conversion of biogenic residues in combination with electricity from renewable sources to methane-based fuels was developed. Forest residues, straw and sewage sludge were identified as particularly relevant input feedstock. By combining gasification, high-temperature electrolysis and catalytic methanation, the biogenic carbon remains almost completely in the products. The matching temperature levels of the heat streams result in a very efficient process. The production costs are comparable to less resource-saving technologies and predictably lower than those of biomethane when plant capacities are increased.

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A Highly Selective and Stable Ruthenium‐Nickel Supported on Ceria Catalyst for Carbon Dioxide Methanation

et al. 2021

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The performance of nickel, ruthenium, and nickel‐ruthenium impregnated on cerium oxide catalysts was tested in the methanation of carbon dioxide reaction. The nickel and ruthenium contents were 4 and 0.4 wt%, respectively. The properties of the catalysts were studied using elementary analysis, Brunauer‐Emmet‐Teller specific surface area measurements, X‐ray diffraction, temperature programmed reduction, temperature programmed desorption, H2 chemisorption and transmission electron microscopy. The results showed that the addition of ruthenium improves the catalytic performance by promoting the dispersion of nickel species over the surface of the cerium oxide support. The ruthenium‐nickel combination produced a stable catalyst that did not show any deactivation even after 75 hours on‐stream. At high feed gas total pressures (5 and 10 bar), the catalytic conversions of CO2 were close to the thermodynamic equilibrium values with a 100 % selectivity towards CH4 formation.

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Power-to-Gas through thermal integration of high-temperature steam electrolysis and carbon dioxide methanation - Experimental results

Cited by 81 publications

References 15 publications

Solid Oxide Electrolyzer System Operational at the H₂ Refueling Station of Karlsruhe

Solid Oxide Electrolyzer System Operational at the H₂ Refueling Station of Karlsruhe

CNG und LNG aus biogenen Reststoffen – ein Konzept zur ressourcenschonenden Kraftstoffproduktion

A Highly Selective and Stable Ruthenium‐Nickel Supported on Ceria Catalyst for Carbon Dioxide Methanation

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Power-to-Gas through thermal integration of high-temperature steam electrolysis and carbon dioxide methanation - Experimental results

Cited by 81 publications

References 15 publications

Solid Oxide Electrolyzer System Operational at the H2 Refueling Station of Karlsruhe

Solid Oxide Electrolyzer System Operational at the H2 Refueling Station of Karlsruhe

CNG und LNG aus biogenen Reststoffen – ein Konzept zur ressourcenschonenden Kraftstoffproduktion

A Highly Selective and Stable Ruthenium‐Nickel Supported on Ceria Catalyst for Carbon Dioxide Methanation

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Product

Resources

About

Solid Oxide Electrolyzer System Operational at the H₂ Refueling Station of Karlsruhe

Solid Oxide Electrolyzer System Operational at the H₂ Refueling Station of Karlsruhe