Modeling of Methane Pyrolysis in a Bubble Column Reactor Operating in Different Flow Regimes.
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| Title: | Modeling of Methane Pyrolysis in a Bubble Column Reactor Operating in Different Flow Regimes. |
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| Authors: | Aliyev, Kamran1 (AUTHOR), Olbricht, Michael2 (AUTHOR) michael.olbricht@tu-clausthal.de |
| Source: | Energies (19961073). Feb2026, Vol. 19 Issue 4, p884. 31p. |
| Subjects: | Bubble column reactors, Chemical kinetics, Computer simulation, Sensitivity analysis, Hydrodynamics, Hydrogen production, Chemical reactions, Heat transfer |
| Abstract: | Methane pyrolysis in molten metal bubble column reactors (MMBCR) is a promising technology for hydrogen production with minimal CO2 emissions. This study presents a numerical model, which is computationally easy to handle, for early industrial analysis and scalability, focusing on both homogeneous and heterogeneous flow regimes. The one-dimensional model integrates thermodynamics, hydrodynamics, heat transfer, and reaction kinetics and is validated against experimental data at varying temperatures and flow rates. Simulation results indicate that the commonly assumed homogeneous flow regime in laboratory experiments may not always apply, particularly at higher temperatures and flow rates. Transitions into the heterogeneous regime were observed more frequently than expected, challenging the existing models that often neglect these conditions. Furthermore, it was found that Kassel's kinetic model is suitable for temperatures up to 1095 °C (±5 °C), while Napier's kinetic model provides better accuracy at higher temperatures. A detailed analysis of the key parameters was conducted to assess their influence on conversion rates. Sensitivity analysis revealed that reaction rates and gas holdup significantly affect conversions, whereas bubble diameter and heat transfer coefficients had minor effects. Thus, this study provides new insights into methane pyrolysis in MMBCRs, particularly under both homogenous and heterogeneous flow conditions. [ABSTRACT FROM AUTHOR] |
| Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 191973304 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Modeling of Methane Pyrolysis in a Bubble Column Reactor Operating in Different Flow Regimes. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Aliyev%2C+Kamran%22">Aliyev, Kamran</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Olbricht%2C+Michael%22">Olbricht, Michael</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> michael.olbricht@tu-clausthal.de</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Feb2026, Vol. 19 Issue 4, p884. 31p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Bubble+column+reactors%22">Bubble column reactors</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+kinetics%22">Chemical kinetics</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Sensitivity+analysis%22">Sensitivity analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrodynamics%22">Hydrodynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen+production%22">Hydrogen production</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+reactions%22">Chemical reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+transfer%22">Heat transfer</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Methane pyrolysis in molten metal bubble column reactors (MMBCR) is a promising technology for hydrogen production with minimal CO2 emissions. This study presents a numerical model, which is computationally easy to handle, for early industrial analysis and scalability, focusing on both homogeneous and heterogeneous flow regimes. The one-dimensional model integrates thermodynamics, hydrodynamics, heat transfer, and reaction kinetics and is validated against experimental data at varying temperatures and flow rates. Simulation results indicate that the commonly assumed homogeneous flow regime in laboratory experiments may not always apply, particularly at higher temperatures and flow rates. Transitions into the heterogeneous regime were observed more frequently than expected, challenging the existing models that often neglect these conditions. Furthermore, it was found that Kassel's kinetic model is suitable for temperatures up to 1095 °C (±5 °C), while Napier's kinetic model provides better accuracy at higher temperatures. A detailed analysis of the key parameters was conducted to assess their influence on conversion rates. Sensitivity analysis revealed that reaction rates and gas holdup significantly affect conversions, whereas bubble diameter and heat transfer coefficients had minor effects. Thus, this study provides new insights into methane pyrolysis in MMBCRs, particularly under both homogenous and heterogeneous flow conditions. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/en19040884 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 31 StartPage: 884 Subjects: – SubjectFull: Bubble column reactors Type: general – SubjectFull: Chemical kinetics Type: general – SubjectFull: Computer simulation Type: general – SubjectFull: Sensitivity analysis Type: general – SubjectFull: Hydrodynamics Type: general – SubjectFull: Hydrogen production Type: general – SubjectFull: Chemical reactions Type: general – SubjectFull: Heat transfer Type: general Titles: – TitleFull: Modeling of Methane Pyrolysis in a Bubble Column Reactor Operating in Different Flow Regimes. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Aliyev, Kamran – PersonEntity: Name: NameFull: Olbricht, Michael IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 02 Text: Feb2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 19961073 Numbering: – Type: volume Value: 19 – Type: issue Value: 4 Titles: – TitleFull: Energies (19961073) Type: main |
| ResultId | 1 |
