Numerical analysis of hydrogen recombination on a vertical flat plate catalyst
This study conducts a computational fluid dynamics (CFD) analysis to assess passive autocatalytic recombiners (PARs) for mitigating hydrogen risks in severe accidents. We modeled hydrogen-air mixtures' thermal-fluid dynamics and chemical reactions, comparing single-step reaction rate models wit...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025002075 |
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| author | Dae-Hyun Kim Youngsu Na Dong-Wook Oh |
| author_facet | Dae-Hyun Kim Youngsu Na Dong-Wook Oh |
| author_sort | Dae-Hyun Kim |
| collection | DOAJ |
| description | This study conducts a computational fluid dynamics (CFD) analysis to assess passive autocatalytic recombiners (PARs) for mitigating hydrogen risks in severe accidents. We modeled hydrogen-air mixtures' thermal-fluid dynamics and chemical reactions, comparing single-step reaction rate models with detailed chemical mechanisms on platinum-coated catalyst plates. Results indicate that the simplified single-step model accurately predicts hydrogen recombination on Pt surfaces. Incorporating radiative heat transfer was essential; neglecting it led to significant overestimations of catalyst plate temperatures and hydrogen removal rates. While CFD results aligned with experimental trends from the REKO-3 apparatus, discrepancies arose due to overestimated recombination rates. These findings highlight the importance of precise chemical and thermal modeling in optimizing PAR design, enhancing hydrogen reduction efficiency, and minimizing auto-ignition risks. The validated CFD model offers valuable guidance for improving hydrogen removal efficiency of PARs during severe accidents. |
| format | Article |
| id | doaj-art-12b91d3bf0084b2e8b23934a27b33f54 |
| institution | Kabale University |
| issn | 2590-1230 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj-art-12b91d3bf0084b2e8b23934a27b33f542025-01-31T05:12:19ZengElsevierResults in Engineering2590-12302025-03-0125104119Numerical analysis of hydrogen recombination on a vertical flat plate catalystDae-Hyun Kim0Youngsu Na1Dong-Wook Oh2Department of Mechanical Engineering, Chosun University, 10 Chosundae 1 Beon-gil, Gwangju 61452, South KoreaKorea Atomic Energy Research Institute, 111, Daedeok-daero 989 Beon-gil, Yuseong-gu, Daejeon, 34057, South KoreaDepartment of Mechanical Engineering, Chosun University, 10 Chosundae 1 Beon-gil, Gwangju 61452, South Korea; Corresponding author.This study conducts a computational fluid dynamics (CFD) analysis to assess passive autocatalytic recombiners (PARs) for mitigating hydrogen risks in severe accidents. We modeled hydrogen-air mixtures' thermal-fluid dynamics and chemical reactions, comparing single-step reaction rate models with detailed chemical mechanisms on platinum-coated catalyst plates. Results indicate that the simplified single-step model accurately predicts hydrogen recombination on Pt surfaces. Incorporating radiative heat transfer was essential; neglecting it led to significant overestimations of catalyst plate temperatures and hydrogen removal rates. While CFD results aligned with experimental trends from the REKO-3 apparatus, discrepancies arose due to overestimated recombination rates. These findings highlight the importance of precise chemical and thermal modeling in optimizing PAR design, enhancing hydrogen reduction efficiency, and minimizing auto-ignition risks. The validated CFD model offers valuable guidance for improving hydrogen removal efficiency of PARs during severe accidents.http://www.sciencedirect.com/science/article/pii/S2590123025002075Passive autocatalytic recombinerHydrogen recombinationComputational fluid dynamicsCatalyst plate |
| spellingShingle | Dae-Hyun Kim Youngsu Na Dong-Wook Oh Numerical analysis of hydrogen recombination on a vertical flat plate catalyst Results in Engineering Passive autocatalytic recombiner Hydrogen recombination Computational fluid dynamics Catalyst plate |
| title | Numerical analysis of hydrogen recombination on a vertical flat plate catalyst |
| title_full | Numerical analysis of hydrogen recombination on a vertical flat plate catalyst |
| title_fullStr | Numerical analysis of hydrogen recombination on a vertical flat plate catalyst |
| title_full_unstemmed | Numerical analysis of hydrogen recombination on a vertical flat plate catalyst |
| title_short | Numerical analysis of hydrogen recombination on a vertical flat plate catalyst |
| title_sort | numerical analysis of hydrogen recombination on a vertical flat plate catalyst |
| topic | Passive autocatalytic recombiner Hydrogen recombination Computational fluid dynamics Catalyst plate |
| url | http://www.sciencedirect.com/science/article/pii/S2590123025002075 |
| work_keys_str_mv | AT daehyunkim numericalanalysisofhydrogenrecombinationonaverticalflatplatecatalyst AT youngsuna numericalanalysisofhydrogenrecombinationonaverticalflatplatecatalyst AT dongwookoh numericalanalysisofhydrogenrecombinationonaverticalflatplatecatalyst |