Experimental comparison of solar methane pyrolysis in gas-phase and molten-tin bubbling tubular reactors

Msheik, Malek; Rodat, Sylvain; Abanades, Stéphane

doi:10.1016/j.energy.2022.124943

Cited by 34 publications

(6 citation statements)

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“…The type of metal used in this technology also has an important influence on the overall performance of the process, which has been studied by several research groups for different liquid metals (Sn, Ga or Ni-Bi and Cu-Bi alloys). In addition to the aforementioned conversion of CH4 to H2 with yield of almost 80% (Figure 13), Msheik et al [273] achieved a conversion of up to 93% by raising the temperature to 1400 °C in a tubular solar reactor with a liquid tin bath height of 120 mm. Using pure molten Ga, Perez et al [280] achieved a conversion of 91% at 1119 °C.…”

Section: Accepted Manuscriptmentioning

confidence: 98%

“…They can be heated directly (like reactors at the focal point of parabolic dishes) or indirectly (as in large solar towers with a heat transfer fluid). Molten tin (Sn)-based pyrolysis of methane has been tested using a solar furnace with a parabolic dish, [273] while Zheng et al [274] have proposed a system for coupling a solar tower with a liquid metal reactor. A process for the production of H2 from methane pyrolysis based on liquid metal technology was demonstrated at KALLA, KIT in Germany.…”

Section: Pyrolysis Of Hydrocarbons Based On Liquid Metal Reactor Tech...mentioning

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: Accepted Manuscriptmentioning

confidence: 98%

Section: Pyrolysis Of Hydrocarbons Based On Liquid Metal Reactor Tech...mentioning

confidence: 99%

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

et al. 2023

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“…Die Art des bei dieser Technologie verwendeten Metalls hat ebenfalls einen wichtigen Einfluss auf die Gesamtleistung des Prozesses, der von mehreren Forschungsgruppen für verschiedene Flüssigmetalle (Sn, Ga oder NiÀ Bi-und CuÀ Bi-Legierungen) untersucht wurde. Neben der bereits erwähnten Umwandlung von CH 4 in H 2 mit einer Ausbeute von fast 80 % (Abbildung 13) erreichten Msheik et al [273] eine Umwandlung von bis zu 93 % durch Erhöhung der Temperatur auf 1400 °C in einem röhrenförmigen Solarreaktor mit einer Höhe des Flüssigzinnbads von 120 mm. Unter Verwendung von reinem flüssigem Ga erreichten Perez et al [280] eine Umwandlung von 91 % bei 1119 °C.…”

Section: Pyrolyse Von Kohlenwasserstoffen Mit Flüssigmetallreaktortec...unclassified

“…Sie können direkt (wie Reaktoren im Brennpunkt von Parabolspiegeln) oder indirekt (wie in großen Solartürmen mit einer Wärmeübertragungsflüssigkeit) beheizt werden. Die Pyrolyse von Methan auf der Basis von flüssigem Zinn (Sn) wurde unter Verwendung eines Solarofens mit einem Parabolspiegel getestet, [273] während Zheng et al [274] . ein System zur Kopplung eines Solarturms mit einem Flüssigmetallreaktor vorgeschlagen haben.…”

Section: Bewertung Verschiedener Technologien Für Die Wasserstoffprod...unclassified

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

et al. 2023

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“…Herein, methane is bubbled, and thus decomposes while rising in a hot liquid bath. The molten medium can be either a molten metal (such as tin [17][18][19], magnesium [20], tellurium [21], or metallic alloys [22,23]), a molten salt (KCl, KBr, NaCl, NaBr, etc.) [24][25][26], or a molten metal phase overlaid by a molten salt [27].…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation of a Hybrid Solar/Electric Reactor for Hydrogen and Carbon Production from Methane Cracking

Msheik

Rodat²,

Abanades³

2023

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Methane pyrolysis is a transitional technology for environmentally benign hydrogen production with zero greenhouse gas emissions, especially when concentrated solar energy is the heating source for supplying high-temperature process heat. This study is focused on solar methane pyrolysis as an attractive decarbonization process to produce both hydrogen gas and solid carbon with zero CO2 emissions. Direct normal irradiance (DNI) variations arising from inherent solar resource variability (clouds, fog, day-night cycle, etc.) generally hinder continuity and stability of the solar process. Therefore, a novel hybrid solar/electric reactor was designed at PROMES-CNRS laboratory to cope with DNI variations. Such a design features electric heating when the DNI is low and can potentially boost the thermochemical performance of the process when coupled solar/electric heating is applied thanks to an enlarged heated zone. Computational fluid dynamics (CFD) simulations through ANSYS Fluent were performed to investigate the performance of this reactor under different operating conditions. More particularly, the influence of various process parameters including temperature, gas residence time, methane dilution, and hybridization on the methane conversion was assessed. The model combined fluid flow hydrodynamics and heat and mass transfer coupled with gas-phase pyrolysis reactions. Increasing the heating temperature was found to boost methane conversion (91% at 1473 K against ~100% at 1573 K for a coupled solar-electric heating). The increase of inlet gas flow rate Q0 lowered methane conversion since it affected the gas space-time (91% at Q0 = 0.42 NL/min vs. 67% at Q0 = 0.84 NL/min). A coupled heating also resulted in significantly better performance than with only electric heating, because it broadened the hot zone (91% vs. 75% methane conversion for coupled heating and only electric heating, respectively). The model was further validated with experimental results of methane pyrolysis. This study demonstrates the potential of the hybrid reactor for solar-driven methane pyrolysis as a promising route toward clean hydrogen and carbon production and further highlights the role of key parameters to improve the process performance.

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Experimental comparison of solar methane pyrolysis in gas-phase and molten-tin bubbling tubular reactors

Cited by 34 publications

References 50 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

CFD Simulation of a Hybrid Solar/Electric Reactor for Hydrogen and Carbon Production from Methane Cracking

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