Naslov
Numerical analysis of ammonia/methane/air combustion on emission characteristics under elevated pressure

Autori
Baleta, Jakov ; Mikulčić, Hrvoje ; Novak, Tomislav ; Wang, Jin ; Wang, Xuebin ; Qi, Fengsheng ; Wang, Fang ; Zheng, Chenghang

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 24th Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction / Ocłoń, Paweł ; Mikulčić, Hrvoje ; Papadopoulos, Athanasios I. ; Varbanov, Petar S. - Brno : Brno University of Technology, 2021

Skup
24th Conference of Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction (PRES'21)

Mjesto i datum
Brno, Češka Republika, 31.10.2021. - 03.11.2021

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
ammonia/methane combustion ; elevated pressure ; numerical simulation

Sažetak
Due to the prevalence in fossil fuel usage worldwide, international agreements have been made to reduce carbon emissions and make the switch to renewable resources. Hydrogen has appeared as a possible green alternative fuel source, but due to a plethora of current problems with manufacture, transport, and storage it is still not possible to make the transition. Ammonia has presented itself as a realistic vector for the conversion to a hydrogen-based economy due to the widespread usage and because there is existing infrastructure for production, transport, and storage. The ammonia combustion process, as a zero-carbon emission fuel, represents significant potential for reducing global carbon emission levels, but its chemical kinetics still remains subject of research efforts. The objective of the current work was to numerically investigate influence of the changing pressure on emission characteristics of ammonia/methane/air mixtures. Fuel blends of ammonia/methane/air have been used at various pressure levels and equivalence ratios and found that an increase in pressure led to a change in tracked emission levels of NO, CO, CO2, and O2, which were deemed essential markers of combustion efficiency for ammonia fuel blend combustion. Comparison of emission characteristics at differing pressure levels has shown significant decrease in NO concentrations with the rise of pressure, while CO and CO2 were affected to a lower degree. Analysis of the O radical species has shown its strong influence on NO formation, but comparison with the experimental results indicated that chemical kinetics of ammonia/methane/air blends still requires further research.

Izvorni jezik
Engleski

Znanstvena područja
Metalurgija, Strojarstvo

POVEZANOST RADA