Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on SOx Emission Characteristics in Coal Combustion

석탄 연소시 SOx 배출 특성에 관한 연구

  • Kang, Youn Suk (Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University) ;
  • Kim, Sung Su (Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University) ;
  • Lee, Hyun Dong (Fossil Fuel Combustion Power Generation Laboratory) ;
  • Kim, Jae-Kwan (Fossil Fuel Combustion Power Generation Laboratory) ;
  • Hong, Sung Chang (Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University)
  • 강연석 (경기대학교 일반대학원 환경에너지시스템공학과) ;
  • 김성수 (경기대학교 일반대학원 환경에너지시스템공학과) ;
  • 이현동 (한국전력공사 전력연구원 수화력발전연구소) ;
  • 김재관 (한국전력공사 전력연구원 수화력발전연구소) ;
  • 홍성창 (경기대학교 일반대학원 환경에너지시스템공학과)
  • Received : 2011.01.24
  • Accepted : 2011.02.24
  • Published : 2011.04.10
Download PDF
⟨ Previous Next ⟩

Abstract

The characteristics of SOx emission were investigated using SM (India) coal and Berau, C&A (Austria) coal. Experiments were performed in two different ways. In the first type of experiment, the temperature in the furnace was increased and the, samples were combusted at the ignition temperature after filling the furnace with coal. The second experimental method was to add the coal to after maintaining a constant temperature. The results demonstrated that SOx emission from coal combustion depended upon the sulfur content. In the case of Berau coal and C&A coal, an enhancement of combustibility which was accomplished by increasing the combustion temperature, an increase in airflow and decrease in particle size of coals tended to increase $SO_2$ generation. Conversely, in the case of SM coal, the concentration of $SO_2$ tended to decrease, because the high contents of $Fe_2O_3$ in the ashes increased the oxidation power of coal itself, which oxidized $SO_2$ into $SO_3$. In the case of C&A coal, the $SO_2$ peak was only observed twice. This was thought to be caused by the thermal transfer rate from the surface to the interior of the coal.

SM (India)탄과 Berau, C&A (Austria)탄을 이용하여 SOx 배출 특성을 조사하였다. 실험은 석탄 충진 후 노의 온도를 승온하며 발화점에서 연소되도록 하는 방법과 노의 온도를 일정온도로 유지한 후 석탄을 투입하는 두 가지 방법으로 수행하였다. 실험 결과 연소시 발생되는 SOx는 황 함량에 의해 의존됨을 확인하였다. Berau탄과 C&A탄의 경우 연소성의 증진 즉, 연소온도의 상승과 주입 공기량의 증가, 탄의 입자크기의 감소가 이루어질 경우, $SO_2$의 발생이 증가하는 경향을 나타내었다. 반면, SM탄의 경우에는 반대로 발생되는 $SO_2$의 농도가 감소하는 경향을 나타내었다. 이는 회분 내의 $Fe_2O_3$의 높은 함량이 탄 자체의 산화력을 증가시켜 $SO_2$를 $SO_3$로 산화시키는 것으로 나타났다. C&A탄의 경우 $SO_2$ 발생 peak가 두 번 발생하였다. 이는 표면에서 내부로의 열 전달속도에 기인하는 것으로 판단된다.

Keywords

Acknowledgement

Supported by : 지식경제부

References

  1. W. I. Jang, Environmental and Resource Economics Review, 19, 341 (2010).
  2. H. Bosch and F. Janssen, Catal. Today, 2, 369 (1988). https://doi.org/10.1016/0920-5861(88)80002-6
  3. J. N. Armor, Catal. Today, 26, 99 (1995). https://doi.org/10.1016/0920-5861(95)00132-Y
  4. P. Zelenka, W. Cartellieri, and P. Herzog, Appl. Catal., B, 10, 3 (1996). https://doi.org/10.1016/0926-3373(96)00021-5
  5. Y. B. Zel'dovich, Acta Phys. Chim., URSS, 21, 577 (1946).
  6. C. P. Fenimore and G. W. Jones, J. Phys. Chem., 61, 654 (1957). https://doi.org/10.1021/j150551a034
  7. W. Fan, Z. Lin, J. Kuang, and Y. Li, Fuel Process. Technol., 91, 625 (2010). https://doi.org/10.1016/j.fuproc.2010.01.009
  8. K. S. Jung, T. C. Keener, and S. J. Khang, Fuel Process. Technol., 74, 49 (2001). https://doi.org/10.1016/S0378-3820(01)00223-5
  9. J. S. Yeo, Master Dissertation, Gyeongsang National University, Gyeongsangnam-do, Korea (2002).
  10. A. M. Stromberg and H. T. Karlsson, Presented at $SO_2$/NOx Seminar, 4, 204 (1987).
  11. H. B. Kwon, Env. Res. Inst. Kyungnam Univ., 20, 189 (1997).
  12. S. S. Kim, H. J. Choi, H. D. Lee, J. K. Kim, and S. C. Hong, J. Korean Ind. Eng. Chem., 20, 675 (2009).
  13. S. S. Kim, Y. S. Kang, H. D. Lee, J. K. Kim, and S. C. Hong, J. Air Waste Manage. Assoc, 61, 254 (2011). https://doi.org/10.3155/1047-3289.61.3.254
  14. S. V. Manoj, C. D. Mishra, M. Sharma, A. Rani, R. Jain, S. P. Bansal, and K. S. Gupta, Atmos. Environ., 34, 4479 (2000). https://doi.org/10.1016/S1352-2310(00)00117-5
  15. K. Y, Kim, S. Y. No, and Y. J. Kim, Latest Combustion Engineering, Donghwa technology publishing, Seoul (2003).