Geliştirilmiş Delikli Tip Brülör Kullanılarak NH3 Bazlı Yakıtların Yanma Özelliklerinin Belirlenmesi

Abstract

Bu çalışmada, geliştirilmiş bir brülör kullanılarak amonyak bazlı yakıtların yanma davranışını araştırılmaktadır. Bu kapsamda, hidrojen ve metan gazları farklı kütle oranlarında ayrı ayrı amonyak gazına eklenmiş ve Hesaplamalı Akışkanlar Dinamiği (CFD) kodu kullanılarak sayısal olarak analiz edilmiştir. Ön karışımsız simülasyonlar için PDF/Mixture yanma modeli ve termal-NOx kullanılmıştır. Radyasyon modeli olarak P-1 modeli kullanılmıştır. Elde edilen sıcaklık, NOx emisyonu ve H2O mol oranı sonuçları, %100 NH3 yanma durumuyla karşılaştırılarak sunulmuştur. En yüksek sıcaklık değeri olan 1600K, %100 NH3 durumunda elde edilmiştir. NH3'e H2 ve CH4 eklenmesiyle daha düşük sıcaklıklar elde edilmiştir. Özellikle, reaksiyon bölgesinde, NH3/H2 yakıt karışımının ulaştığı en yüksek sıcaklık, NH3/CH4 yakıt karışımına göre yaklaşık 200 K daha yüksek olmuştur. Benzer şekilde, NH3'e H2 ve CH4 eklenmesi, NOx ve H2O mol oranını azaltmıştır. NH3/H2 yakıt karışımında elde edilen NOx ve H2O mol kesri değerleri, NH3/CH4 yakıt karışımında elde edilen değerlerden daha yüksektir.

Keywords

• CFD
• Amonyak
• Hidrojen
• Metan
• Yanma ve Yakma
• Emisyon

Combustion Characteristics of NH3-Based Fuels Using Improved Perforated-Type Burner

Abstract

This study investigates the combustion behavior of ammonia-based fuels using an advanced burner. Within this context, hydrogen and methane have been added to NH3 separately in different mass fractions and numerically analyzed using Computational Fluid Dynamics (CFD) code. The PDF/Mixture combustion model and thermal-Nox have been used for non-premixed simulations. P-1 model has been used as radiation model. The results obtained for temperature, NOx emission, and H2O mole fraction are presented in comparison with 100% NH3 combustion case. The highest temperature value of 1600K was obtained with 100% NH3 case. Lower temperatures were obtained with the H2 and CH4 addition to NH3. Specifically, in the reaction zone, the highest temperature reached by the NH3/H2 fuel blend was approximately 200 K higher than NH3/CH4 fuel blend. Similarly, the addition of H2 and CH4 to NH3 reduced NOx and H2O mole fraction. The NOx and H2O mole fraction values achieved in the NH3/H2 fuel blend have higher values than those obtained in the NH3/CH4 fuel blend.

Keywords

• Combustion
• CFD
• Ammonia
• Hydrogen
• Methane
• Emissions

Supporting Institution

National Defense University

Ethical Statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Thanks

Authors gratefully acknowledges National Defense University for its support.

References

1. [1] Bioche K, Bricteux L, Bertolino A, Parente A, Blondeau J. (2021). Large Eddy Simulation of rich ammonia/hydrogen/air combustion in a gas turbine burner. International Journal of Hydrogen Energy, 46(79): 39548-39562. Doi: 10.1016/j.ijhydene.2021.09.164.
2. [2] Cheng, M., Wang, H., Xiao, H., Luo, K., & Fan, J. (2021). Emission characteristics and heat release rate surrogates for ammonia premixed laminar flames. International Journal of Hydrogen Energy, 46(24), 13461–13470. Doi: 10.1016/j.ijhydene.2021.01.154.
3. [3] Kobayashi, H., Hayakawa, A., Somarathne, K. D. K. A., & Okafor, E. C. (2019). Science and technology of ammonia combustion. Proceedings of the Combustion Institute, 37(1), 109–133. Doi: 10.1016/j.proci.2018.09.029.
4. [4] Elbaz, A. M., Wang, S., Guiberti, T. F., & Roberts, W. L. (2022). Review on the recent advances on ammonia combustion from the fundamentals to the applications. Fuel Communications, 10, 100053. Doi: 10.1016/j.jfueco.2022.100053
5. [5] Wang, D., Ji, C., Wang, Z., Wang, S., Zhang, T., and Yang, J. (2020). Measurement of oxy-ammonia laminar burning velocity at normal and elevated temperatures. Fuel, 279, 118425. Doi: 10.1016/j.fuel.2020.118425.
6. [6] D.T. Pratt “Performance of Ammonia-Fired Gas-Turbine Combustors,” Report TS-67-5, 1967
7. [7] Lee, J. H., Kim, J. H., Park, J. H., & Kwon, O. C. (2010). Studies on properties of laminar premixed hydrogen-added ammonia/air flames for hydrogen production. International Journal of Hydrogen Energy, 35(3), 1054–1064. Doi: 10.1016/j.ijhydene.2009.11.071
8. [8] Valera-Medina, A., Pugh, D. G., Marsh, P., Bulat, G., & Bowen, P. (2017). Preliminary study on lean premixed combustion of ammonia-hydrogen for swirling gas turbine combustors. International Journal of Hydrogen Energy, 42(42), 25854–25865. Doi: 10.1016/j.ijhydene.2017.08.028

9. [9] Xiao, H., Valera-Medina, A. and Bowen, P.J. (2017). Study on Premixed Combustion Characteristics of Co-Firing Ammonia/Methane Fuels. Energy, 140, 125–135
10. [10] Franco, M. C., Rocha, R. C., Costa, M., and Yehia, M. (2021). Characteristics of NH3/H2/air flames in a combustor fired by a swirl and bluff-body stabilized burner.150 Proceedings of the Combustion Institute, 38(4), 5129–5138. doi: 10.1016/j.proci.2020.06.141
11. [11] Nozari, H., and Karabeyoğlu, A. (2015). Numerical study of combustion characteristics of ammonia as a renewable fuel and establishment of reduced reaction mechanisms. Fuel, 159, 223–233. doi: 10.1016/j.fuel.2015.06.075
12. [12] Li, Y., Sun, H., Rauf, M., Al-Ansari, M. M., Gavurová, B., & Sekar, M. (2025). Assessment and optimization of combustion efficiency and emissions of industrial gases burner blended with hydrogen and ammonia gaseous fuel. Renewable Energy, 252, 123543. Doi: 10.1016/j.renene.2025.123543
13. [13] Sahin, M., Ilbas, M., & Arslan, B. (2024). Entrainment effects on combustion and emission characteristics of turbulent non‐premixed ammonia/air and methane/air swirl flames through a developed perforated burner. The Canadian Journal of Chemical Engineering, 102, 1066-1077.
14. [14] Şahin, M. (2022). Entrainment effects on combustion characteristics of various syngases using a perforated burner. International Journal of Hydrogen Energy, 47(34). Doi: 10.1016/j.ijhydene.2022.03.020
15. [15] İlbaş, M., & Şahin, M. (2017). Effects of turbulator angle and hydrogen addition on a biogas turbulent diffusion flame. International Journal of Hydrogen Energy, 42(40). Doi: 10.1016/j.ijhydene.2017.04.111
16. [16] İlbaş, M., Şahin, M., & Karyeyen, S. (2018). 3D numerical modelling of turbulent biogas combustion in a newly generated 10 KW burner. Journal of the Energy Institute, 91(1). Doi: 10.1016/j.joei.2016.10.004
17. [17] Şahin, M., & İlbaş, M. (2020). Analysis of the effect of H₂O content on combustion behaviours of a biogas fuel. International Journal of Hydrogen Energy, 45(5). Doi: 10.1016/j.ijhydene.2019.02.042
18. [18] Sahin, M. (2019). Combustion characteristics of various biogas flames under reduced oxygen concentration conditions. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 41(19). Doi: 10.1080/15567036.2019.1601796
19. [19] Wei, X., Gu, M., Li, S., Wu, Y., Chen, M., Liang, J., & Lin, Q. (2024). Experimental and numerical studies of NO reduction by ammonia in different methane flame positions. Case Studies in Thermal Engineering, 61, 105107. Doi: 10.1016/j.csite.2024.105107
20. [20] Saif, A. G. H., & Mokheimer, E. M. A. (2025). Comprehensive review on ammonia combustion technologies: Combustion characteristics, potential of hydrogen/methane additions, and emerging applications. International Journal of Hydrogen Energy, 148. Doi: 10.1016/j.ijhydene.2025.05.302
21. [21] Angelilli, L., Raman, V., and Im, H. G. (2024). A Generalized Mixture Fraction Formulation for Nonpremixed Ammonia–hydrogen Flames. Proceedings of the Combustion Institute, 40(1–4), Article 105465. Doi: 10.1016/j.proci.2024.105465