Browse > Article
http://dx.doi.org/10.7464/ksct.2021.27.1.93

Numerical Study of Combustion Characteristics by Pressure and Oxygen Concentration in Counter-Flow Diffusion Flame Model  

Park, Jinje (Korea Institute of Industrial Technology)
Lee, Youngjae (Korea Institute of Industrial Technology)
Publication Information
Clean Technology / v.27, no.1, 2021 , pp. 93-103 More about this Journal
Abstract
As the seriousness and necessity of responding to climate change and reducing carbon emissions increases, countries around the world are continuing their efforts to reduce greenhouse gases. Among various efforts, research on CCUS, capturing and utilizing carbon dioxide generated when using carbon-based fuels, is actively being conducted. Studies on pressurized oxy-fuel combustion (POFC) that can be used with CCUS are also being conducted by many researchers. The purpose of this study is to analyze basic information related to the flame structure and pollutant emissions of pressurized oxy-fuel combustion. For this, a counter-flow diffusion flame model was used to analyze the combustion characteristics according to pressure and oxygen concentration. As the pressure increased, the flame temperature increased and the flame thickness decreased due to a reaction rate improvement caused by the activation of the chemical reaction. As oxygen concentration increased, both the flame temperature and the flame thickness increased due to an improvement to the reaction rate and diffusion because of a change in oxidizer momentum. Analyzing the related heat release reaction by dividing it into three sections as the oxygen concentration increased showed that the chemical reaction from the oxidizer side was subdivided into two regions according to the mixture fraction. In addition, the emission index of NO classified according to the NO formation mechanism was analyzed. The formation trend of NO according to each analysis condition was presented.
Keywords
Counter-flow diffusion flame; Methane; POFC; Chemical kinetics; NO emission index;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Smith, G. P., Golden, D. M., Frenklach, M., Moriarty, N. W., Eiteneer, B., Goldenberg, M., Bowman, C. T., Hanson, R. K., Song, S., Gardiner, W. C., Lissianski, V. V., and Qin, Z., "The GRI-mechtm Model for Natural Gas Combustion and NO Formation and Removal Chemistry," In Proceedings of the 5th International Conference on Combustion Technologies for a Clean Environment, http://www.me.berkeley.edu/gri_ mech (1999).
2 Hu, F., Li, P., Guo, J., Wang, K., Liu, Z., and Zheng, C., "Evaluation, Development, and Validation of a New Reduced Mechanism for Methane Oxy-Fuel Combustion," Int. J. Greenh. Gas. Con., 78, 327-340 (2018).   DOI
3 Ministry of Culture, Sports and Tourism, "2050 Carbon Neutral," https://www.korea.kr/special/policyCurationView.do?newsId=148881562 (accessed Feb. 2021).
4 Ministry of Economy and Finance, "2050 Carbon Neutral Strategy," https://www.korea.kr/archive/expDocView.do?docId=39241 (accessed Feb. 2021).
5 Chelliah, H. K., Law, C. K., Ueda, T., Smooke, M. D., and Williams, F. A., "An Experimental and Theoretical Investigation of the Dilution, Pressure and Flow-field Effects on the Extinction Condition of Methan-air-nitrogen Diffusion Flames," Proc. Combust. Inst., 23(1), 503-511 (1991).   DOI
6 Ahmed S. F., Santner, J., Dryer, F. L., Padak, B., and Farouk, T. I., "Computational Study of NOx Formation at Conditions Relevant to Gas Turbine Operation, Part 2: NOx in High Hydrogen Content Fuel Combustion at Elevated Pressure," Energy. Fuels., 30(9), 7691-7703 (2016).   DOI
7 Li, H., Li, G., Sun, Z., Li, Y., and Yuan, Y., "Investigation on Dilution Effect on Laminar Burning Velocity of Syngas Premixed Flames," Energy., 112, 146-152 (2016).   DOI
8 Ren, Y., Qin, W., Egolfopoulos, F. N., and Tsotsis, T. T., "Strain-rate Effects on Hydrogen-enhanced Lean Premixed Combustion," Combust. Flame., 124(4), 717-720 (2001).   DOI
9 Park, J., Park, J. S., Kim, H. P., Kim, J. S., Kim, S. C., Choi, J. G., Cho, H. C., Cho, K. W., and Park, H. S., "NO Emission Behavior in Oxy-fuel Combustion Recirculated with Carbon Dioxide," Energy. Fuels., 21(1), 121-129 (2007).   DOI
10 Gibbins, J., and Chalmers, H., "Carbon Capture and Storage," Energy. Policy., 36(12), 4317-4322 (2008).   DOI
11 Anderson, S., and Newell, R., "Prospects for Carbon Capture and Storage technologies," Anmu. Rev. Environ. Resour., 29, 109-142 (2004).   DOI
12 Soundararajan, R., and Gundersen, T., "Coal based Power Plants Using Oxy-combustion for CO2 Capture: Pressurized Coal Combustion to Reduce Capture Penalty," Appl. Therm. Eng., 61(1), 115-122 (2013).   DOI
13 Takeno, T., and Nishioka, M., "Species Conservation and Emission Indices for Flames Described by Similarity Solutions," Combust. Flame., 92(4), 465-468 (1993).   DOI
14 Hwang, C. H., Yoo, B. H., Lee, C. E., and Han, J. W., "NOx Formation Characteristics with Oxygen Enrichment in Nonpremixed Counterflow Flames," J. Kor. Inst. Gas., 11(4), 17-22 (2007).
15 Fisher, M., and Jiang, X., "A Chemical Kinetic Modelling Study of the Combustion of CH4-CO-H2-CO2 Fuel Mixtures," Combust., Flame., 167, 274-293 (2016).   DOI
16 Bui, M., Adjiman, C. S., Bardow, A., Anthony, E. J., Boston, A., Brown, S., Fennell, P. S., Fuss, S., Galindo, A., Hackett, L. A., Hallett, J. P., Herzog, H. J., Jackson, G., Kemper, J., Krevor, S., Maitland, G. C., Matuszewski, M., Metcalfe, I. S., Petit, C., Puxty, G., Reimer, J., Reiner, D. M., Rubin, E. S., Scott, S. A., Shah, N., Smit, B., Trusler, J. P. M., Webley, P., Wilcox, J., and Dowell, N. N., "Carbon Capture and Storage (CCS): The Way Forward," Energy. Environ. Sci., 11(5), 1062-1176 (2018).   DOI
17 Hong, J. S., Ghaudhry, G., Brisson, J. G., Field, R., Gazzino, M., and Ghoniem, A. F., "Analysis of Oxy-fuel Combustion Power Cycle Utilizing a Pressurized Coal Combustion," Energy., 34(9), 1332-1340 (2009).   DOI
18 Zebian, H., Gazzino, M., and Mitsos, A., "Multi-variable Optimization of Pressurized Oxy-coal Combustion," Energy., 38(1), 37-57 (2012).   DOI
19 Kee, R. J., Miller, J. A., Evans, G. H., and Dixon-Lewis, G., "A Computational Model of the Structure and Extinction of Strained, Opposed Flow, Premixed Methane-air Flames," Proc. Combust. Inst., 22(1), 1479-1494 (1989).   DOI