Effects of Steam Addition to the Oxidizer on the Combustion Performance and Emissions of Coke Oven Gas: A Numerical Study

Öz

This study investigates the effects of adding steam to the oxidizer on the combustion behavior of coke oven gas through numerical simulations. The analysis used the commercial computational fluid dynamics (CFD) software Ansys Fluent. The results obtained for the case where dry air was used as the oxidizer were compared with experimental data. The k-Ɛ standard turbulence model was employed for turbulence modeling, while the PDF/Mixture Fraction combustion model and the P-1 radiation model were used for the three-dimensional numerical simulations. According to the simulation results, adding steam to the oxidizer slightly reduced the temperature of the COG. When assessing the emissions, it was observed that NOX emissions significantly decreased, while CO2 emissions showed a slight reduction. However, CO emissions were found to increase slightly. In conclusion, the study indicates that adding steam to the oxidizer significantly mitigates the high NOX emissions typically associated with using coke oven gas as an alternative fuel.

Anahtar Kelimeler

• Combustion
• Coke oven gas
• Steam
• CFD

Kaynakça

1. [1] Karyeyen S, İlbaş M. Oksitleyiciye su buharı ilavesinin kok fırını gazı yanma davranışlarına olan etkisinin sayısal olarak incelenmesi. Gazi Üniversitesi Fen Bilim Derg Part C Tasarım ve Teknol 2018;6:319–35.
2. [2] Ilbas M, Karyeyen S. An experimental and numerical study on turbulent combustion of hydrogen-rich coal gases in a generated non-premixed burner. Fuel 2017;194:274–90.
3. [3] Guo Z, Tang H. Numerical simulation for a process analysis of a coke oven. China Particuology 2005;3:373–8.
4. [4] Zhao YJ, Feng JX, Huang SP, Hu SY. Analysis and evaluation of the influence of heat storage material on coke oven flue gas exothermic process. Therm Sci 2021;25:1095–108.
5. [5] Asai T, Dodo S, Koizumi H, Takahashi H, Yoshida S, Inoue H. Effects of Multiple-Injection-Burner Configurations on Combustion Characteristics for Dry Low-NOx Combustion of Hydrogen-Rich Fuels. Proc ASME Turbo Expo 2012;2:311–20.
6. [6] Lee MC, Yoon J, Joo S, Yoon Y. Gas turbine combustion characteristics of H2/CO synthetic gas for coal integrated gasification combined cycle applications. Int J Hydrogen Energy 2015;40:11032–45.
7. [7] Lee MC, Seo S Bin, Chung JH, Kim SM, Joo YJ, Ahn DH. Gas turbine combustion performance test of hydrogen and carbon monoxide synthetic gas. Fuel 2010;89:1485–91.
8. [8] Lee MC, Seo S Bin, Yoon J, Kim M, Yoon Y. Experimental study on the effect of N2, CO2, and steam dilution on the combustion performance of H2 and CO synthetic gas in an industrial gas turbine. Fuel 2012;102:431–8.

9. [9] Habib MA, Mokheimer EMA, Sanusi SY, Nemitallah MA. Numerical investigations of combustion and emissions of syngas as compared to methane in a 200 MW package boiler. Energy Convers Manag 2014;83:296–305.
10. [10] Tian Y, Zang S, Ge B. Experimental investigation on the combustion performance of N2 dilution in syngas non-premix combustion in humid air conditions. Appl Therm Eng 2016;107:560–4.
11. [11] Li S, Li S, Mira D, Zhu M, Jiang X. Investigation of dilution effects on partially premixed swirling syngas flames using a LES-LEM approach. J Energy Inst 2018;91:902–15.
12. [12] Li Z, Yi Q, Zhang Y, Zhou H, Zhao Y, Huang Y, et al. Numerical study and design strategy for a low emission coke oven system using oxy-fuel combustion of coke oven gas. J Clean Prod 2020;252:119656.
13. [13] H. K. Versteeg WM. An introduction to computational fluid Dynamics. PEARSON Prentice Hall; 2007.
14. [14] M. Ilbas. Studies of ultra low NOX burner. University of Wales, College of Cardiff, UK, 1997.
15. [15] Karyeyen S, Feser JS, Gupta AK. Swirl assisted distributed combustion behavior using hydrogen-rich gaseous fuels. Appl Energy 2019;251:113354.