(메탄+암모니아)/공기 예혼합 1단 연소기에서의 화염구조와 NO 배출
Flame Structure and NO emission in A Single-stage (Methane +Ammonia)/Air Premixed Single Combustor
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Numerical study is conducted to clarify flame structures and NO emissions in a single-staged (ammonia+methane)/air premixed combustion, which can be presumed with a counterflow configuration. To clarify the important role of downstream interaction on flame characteristics and NO emissions, injecting (80% methane+20% ammonia)/air mixtures to the ambiences of nitrogen and air is studied. When lean blended fuel/air premixed mixtures are injected to the ambiences of nitrogen and air, there are no significant change in flame structure and NO emission. When the rich premixed mixtures are injected to air (nitrogen) ambience, an interacting flame consisting of a rich premixed flame and a diffusion flame (a single rich premixed flame) is generated. The difference in such flame configurations completely alters flame structure and NO emission behavior. The present results can be utilized as a baseline case in reducing NO emission via various combinations such as ammonia-air, methane-air, pure air, and (ammoniar+methane)/air in the secondary zone of a two-stage ammonia blended methane/air premixed combustor.
Abstract
Numerical study is conducted to clarify flame structures and NO emissions in a single-staged (ammonia+methane)/air premixed combustion, which can be presumed with a counterflow configuration. To clarify the important role of downstream interaction on flame characteristics and NO emissions, injecting (80% methane+20% ammonia)/air mixtures to the ambiences of nitrogen and air is studied. When lean blended fuel/air premixed mixtures are injected to the ambiences of nitrogen and air, there are no significant change in flame structure and NO emission. When the rich premixed mixtures are injected to air (nitrogen) ambience, an interacting flame consisting of a rich premixed flame and a diffusion flame (a single rich premixed flame) is generated. The difference in such flame configurations completely alters flame structure and NO emission behavior. The present results can be utilized as a baseline case in reducing NO emission via various combinations such as ammonia-air, methane-air, pure air, and (ammoniar+methane)/air in the secondary zone of a two-stage ammonia blended methane/air premixed combustor.
참고문헌 (20)
- 이후경, "탄소중립을 위한 암모니아 연소기술의 연구개발 필요성 - Part Ⅰ 연료 암모니아의 보급확대 배경과 경제성", 한국연소학회지, 26(1), pp.59~83 (2021), 한국연소학회[DOI]
- 이후경, "탄소중립을 위한 암모니아 연소기술의 연구개발 필요성 - Part Ⅱ 연구개발 동향과 기술적 타당성 분석", 한국연소학회지, 26(1), pp.84~106 (2021), 한국연소학회[DOI]
- H. Kobayashi, "Science and technology of ammonia combustion", Proc. Combust. Inst, 37, pp.109~133 (2019)
- A fortran program for computing opposed-flow diffusion flames, "A.E. Lutz", Sandia National Laboratories, ~, pp.SAND 96-8243 (1997)
- Chemkin II: a fortran chemical kinetics package for analysis of gas phase chemival kinetics, "R.J. Kee", Sandia National Laboratories, ~, pp.SAND 89-8009B (1989)
- A fortran computer code package for the evaluation of gas-phase multi-component transport, "R.J. Kee", Sandia National Laboratories, ~, pp.SAND86-8246 (1996)
- O. Mathieu, "Experimental and modeling study on the high-temperature oxidation of Ammonia and related NOx chemistry", Combust. Flame, 162(3), pp.554~570 (2015)
- J. A. Miller, "Mechanism and moldeing of nitrogen chemistry in combustion", Prog. Energy Combust. Sci, 15(4), pp.287~338 (1989)
- A. A. Konnov, "A possible new route for NO formation via N2H3", Combust. Sci. Technol, 168, pp.1~46 (2001)
- C. Duynslaegher, "Modeling of ammonia combustion at low pressure", Combust Flame, 159(9), pp.2799~2805
- P. Dagaut, "The oxidation of hydrogen cyanide and related chemistry", 34(1), pp.1~46 (2008)
- S. J. Klippenstein, "The role of NNH in NO formation and control", Combust. Flame, 159, pp.774~789 (2011)
- M. A. Meuller, "Kinetic modeling of the CO", H2O, NO, pp.SO2 system:Implication for high-pressure fall-off in the SO2+O (+M) =SO3(+M) reaction, Int. J. Chem. Kinet[DOI]
- P. Dagaut, "Experimental and kinetic modeling study of the effect of SO2 on the reduction of NO by ammonia", Proc. Combust. Inst, 30, pp.1211~1218 (2005)
- E.C. Okafor, "Experimental and numerical study of the laminar burning velocity of CH4-NH3-air premixed flames", Combust. Flame, 187, pp.185~198 (2018)
- Y. Ju, "On the extinction limit and flammability of non-adiabatic stretched methane-air premixed flames", J. Fluid Mech, 342, pp.315~334 (1997)
- Y.S. Kang, "Mutually interacting SNG-air premixed flames", Fuel, 285, pp.119065~ (2021)
- K.S. Sim, "A study on flame extinction behavior in downstream interaction between SNG-air oremixed flames", Fuel, 210, pp.545~556 (2017)
- T.H. Kim, "Downstream interaction between stretched premixed syngas-air flames", Fuel, 105, pp.739~748 (2013)
- J. Park, "Addition effects of H2and H2O on flame structure and pollutant emissions in methane-air diffusion flame", Energy & Fuels, 21, pp.3216~3224 (2007)