Using Ammonia as Future Energy: Modelling of Reaction Mechanism for Ammonia/Hydrogen Blends
To utilize ammonia-based fuels, it is fundamental to understand chemical mechanisms of combustion process, in which reaction characteristics of such a chemical are described in detail. Detailed chemical-kinetics mechanism of ammonia was modelled by an automatic reaction mechanism generation program...
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| Veröffentlicht in: | Journal of physics. Conference series 2022-10, Vol.2361 (1), p.12012 |
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| creator | Xiao, Hua Chen, Aiguo Zhang, Minghui Guo, Yanze Ying, Wenxuan |
| description | To utilize ammonia-based fuels, it is fundamental to understand chemical mechanisms of combustion process, in which reaction characteristics of such a chemical are described in detail. Detailed chemical-kinetics mechanism of ammonia was modelled by an automatic reaction mechanism generation program to investigate characteristics of premixed combustion for ammonia/hydrogen fuel mixture. To develop an accurate model for practical combustion applications, validation of the reaction mechanism was carried out in terms of laminar flame speed under different conditions. Results suggested that the established mechanism model has satisfying performance under different ammonia/hydrogen ratio conditions. Moreover, comparison with other mechanism models demonstrated that the developed model can be used to describe flame propagation of ammonia/hydrogen fuels. Then characteristics of laminar flame speed were predicted under various ammonia concentration and equivalence ratio conditions. Sensitivity analyses showed that ammonia mole fraction has a prominent impact on kinetics of flame speed for ammonia/hydrogen blends. Flame structure analyses showed that hydrogen can enhance ammonia flames with higher light radical concentrations whilst deteriorate NOx emission in exhaust gases. |
| doi_str_mv | 10.1088/1742-6596/2361/1/012012 |
| format | Article |
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Then characteristics of laminar flame speed were predicted under various ammonia concentration and equivalence ratio conditions. Sensitivity analyses showed that ammonia mole fraction has a prominent impact on kinetics of flame speed for ammonia/hydrogen blends. 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| subjects | Ammonia Combustion Emissions Equivalence ratio Exhaust gases Flame propagation Flame speed Flame structure Flames Fuel mixtures Hydrogen Hydrogen fuels Kinetics Mixtures Physics Reaction mechanisms |
| title | Using Ammonia as Future Energy: Modelling of Reaction Mechanism for Ammonia/Hydrogen Blends |
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