Contributions of Experimental Data Obtained in Concentrated Mixtures to Kinetic Studies: Application to Monomethylhydrazine Pyrolysis
| Autor: | Laurent Catoire, Pascal Diévart |
|---|---|
| Přispěvatelé: | École Nationale Supérieure de Techniques Avancées (ENSTA Paris) |
| Rok vydání: | 2020 |
| Předmět: |
Argon
Explosive material ab initio Thermal decomposition chemistry.chemical_element Thermodynamics monomethylhydrazine kinetic model shock tube pyrolysis Kinetic energy Monomethylhydrazine law.invention [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry Ignition system chemistry.chemical_compound [CHIM.GENI]Chemical Sciences/Chemical engineering Reaction rate constant chemistry law Physical and Theoretical Chemistry Pyrolysis |
| Zdroj: | Journal of Physical Chemistry A Journal of Physical Chemistry A, American Chemical Society, 2020, 124 (30), pp.6214-6236. ⟨10.1021/acs.jpca.0c03144⟩ |
| ISSN: | 1520-5215 1089-5639 |
| Popis: | International audience; Experimental, numerical and theoretical studies are performed to understand the explosive thermal decomposition of monomethylhydrazine/argon mixtures. Ignition delays of concentrated MMH/Ar mixtures (20-30%) have been measured behind a reflected shock wave around 1000 K and 1 atm. Although several detailed chemical kinetic models have predictive abilities for diluted and highly diluted mixtures, none of them showed predictive for concentrated mixtures. A new kinetic model is proposed, in which numerous rate constants and thermochemical data are reassessed based on theoretical calculations, with the purpose to determine whether,or to what extent, trends derived from diluted or highly diluted MMH/Ar mixtures can explain observations in concentrated MMH mixtures. The present kinetic model is found to predict speciation experimental profiles in diluted MMH/Ar mixtures and is a significant improvement in predicting theinduction delays of concentrated MMH/Ar mixtures. |
| Databáze: | OpenAIRE |
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