In this study, extinction limit and emission characteristics of COG(Coke Oven Gas), was numerically investigated using counterflow nonpremixed flames to verify usage as a combustion fuel. Also, ammonia (NH3) added COG was studied to reduce carbon emission. OPPDIF code with GRI 3.0 detailed kinetic mechanism was used to predict the extinction limit, EINOx and NO production rates. As results, the extinction limit of COG was greatly expanded compared to CH4, and it was confirmed that the maximum flame temperature at the extinction point was also greatly reduced due to H2, which accounts for 55% of COG. When NH3 was added, the extinction limits gradually decreased, and the maximum flame temperature at the extinction point increased, which is due to the low combustion reactivity of NH3. Meanwhile, it can be confirmed that NOx emissions increased rapidly as NH3 was added.

Abstract
1. 서 론
2. 연구 방법
3. 결과 및 논의
4. 결 론
References

• 금성민(Dept. of Mechanical and Automotive Engineering, Halla University) | Sung-Min Kum
• 이승로(Dept. of mechanical Engineering. Jeonbuk National Univ.) | Seungro Lee Corresponding author