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Oxy-combustion Characteristics of Coal and Waste Fuels with the Concentrations of Oxygen and Carbon Dioxide

산소/이산화탄소 농도 변화에 따른 석탄과 폐기물 연료의 순산소 연소 특성

  • Kang, Sin-Wook (Department of Environmental Engineering, Chungbuk National University) ;
  • Park, Jeong Min (Department of Environmental Engineering, Chungbuk National University) ;
  • Lee, Sang-Sup (Department of Environmental Engineering, Chungbuk National University)
  • 강신욱 (충북대학교 환경공학과) ;
  • 박정민 (충북대학교 환경공학과) ;
  • 이상섭 (충북대학교 환경공학과)
  • Received : 2017.08.17
  • Accepted : 2017.09.11
  • Published : 2017.10.31

Abstract

This study was designed to understand characteristics of oxy-combustion of coal, dried sewage sludge and solid refuse fuel (SRF). Thermogravimetric analysis was conducted by burning the fuels with air, 21% oxygen ($O_2$)/79% carbon dioxide ($CO_2$) and 30% $O_2/70%$ $CO_2$. Heating rates were varied as 5, 10, 25, 40 and $100^{\circ}C/min$. Complete coal combustion was found at the heating rates of 5, 10, 25 and $40^{\circ}C/min$, and different combustion behavior was found with the gas composition at the heating rates of 10, 25, 40 and $100^{\circ}C/min$. Coal combustion with 30% $O_2/70%$ $CO_2$ showed the highest while coal combustion with 21% $O_2/79%$ $CO_2$ showed the lowest combustion rate. On the other hand, the combustion of dried sewage sludge and SRF showed similar combustion behavior with respect to the combustion gas composition. This suggests that oxy-combustion of dried sewage sludge and SRF which contain a large amount of volatile matter may show similar combustion behavior to their air combustion.

Keywords

Oxy-combustion;$CO_2$ control;Greenhouse gas control;Climate change

Acknowledgement

Supported by : 한국연구재단, 한국에너지기술평가원 (KETEP)

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