Atomic Perspective about the Reaction Mechanism and H2 Production during the Combustion of Al Nanoparticles/H2O2 Bipropellants
The combination of Al nanoparticles (ANPs) and hydrogen peroxide (H2O2) can serve as environmentally friendly bipropellants and maximize the energetic benefits through harnessing heat release and chemical energy stored in H2. This work presents an atomic insight into the combustion mechanism of ANPs/H2O2. Two main paths, including the ANPs oxidation by H2O2 to produce H2 and Al oxides, and the catalytic decomposition of H2O2 on ANP surface to generate O2 and H2O, are confirmed to maintain the combustion. OH and HOO radicals as well as H2O, O2, H2, and Al oxides are detected as dominant intermediates and products therein. It is evidenced that higher temperature, smaller ANP size, and higher H2O2 concentration enhance the combustion. Moreover, atomic details show that the H desorption from ANPs/Al clusters is a critical step for both H2 production and ANP oxidation. In addition, microexplosion that has been confirmed in hot and dense O2 is not observed in H2O2, even with a high concentration, possibly due to a slower heat release. Besides, the observed excellent specific impulse of the ANP/H2O2 bipropellants could be attributed to the considerable H2 production, instead of heat release. This work is expected to present an overall atomic perspective about the combustion mechanism of ANP/H2O2 bipropellants.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2020 |
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| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:124 |
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| Enthalten in: |
The journal of physical chemistry. A - 124(2020), 37 vom: 17. Sept., Seite 7399-7410 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Li, Gang [VerfasserIn] |
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| Links: |
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| Themen: |
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| Anmerkungen: |
Date Revised 17.09.2020 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1021/acs.jpca.0c05901 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM314045813 |
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| 245 | 1 | 0 | |a Atomic Perspective about the Reaction Mechanism and H2 Production during the Combustion of Al Nanoparticles/H2O2 Bipropellants |
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| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a The combination of Al nanoparticles (ANPs) and hydrogen peroxide (H2O2) can serve as environmentally friendly bipropellants and maximize the energetic benefits through harnessing heat release and chemical energy stored in H2. This work presents an atomic insight into the combustion mechanism of ANPs/H2O2. Two main paths, including the ANPs oxidation by H2O2 to produce H2 and Al oxides, and the catalytic decomposition of H2O2 on ANP surface to generate O2 and H2O, are confirmed to maintain the combustion. OH and HOO radicals as well as H2O, O2, H2, and Al oxides are detected as dominant intermediates and products therein. It is evidenced that higher temperature, smaller ANP size, and higher H2O2 concentration enhance the combustion. Moreover, atomic details show that the H desorption from ANPs/Al clusters is a critical step for both H2 production and ANP oxidation. In addition, microexplosion that has been confirmed in hot and dense O2 is not observed in H2O2, even with a high concentration, possibly due to a slower heat release. Besides, the observed excellent specific impulse of the ANP/H2O2 bipropellants could be attributed to the considerable H2 production, instead of heat release. This work is expected to present an overall atomic perspective about the combustion mechanism of ANP/H2O2 bipropellants | ||
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| 700 | 1 | |a Xue, Xianggui |e verfasserin |4 aut | |
| 700 | 1 | |a Hao, Weizhe |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Yu |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Chaoyang |e verfasserin |4 aut | |
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