가스분석을 이용한 석탄 종류별 CO2 가스화 반응특성 연구
Characteristics of various ranks of coal gasification with CO2 by gas analysis
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초록
Various coals from many countries around the world have been used for pulverized coal boiler in power plants in Korea. In this study, the gasification reactivities of various coal chars with CO2 were investigated. Carbon conversion was measured using a real time gas analyzer with NDIR CO/CO2 sensor. In a lab scale furnace,each coal sample was devolatilized at 950℃ in nitrogen atmosphere and became coal char and then further heated up to reach to a desired temperature. Each char was then gasified with CO2 under isothermal conditions. The reactivities of coal chars were investigated at different temperatures. The shrinking core model (SCM) and volume reaction model(VRM) were used to interpret the experiment data. It was found that the SCM and VRM could describe well the experimental results within the carbon conversion of 0-0.98. The gasification rates for various coals were very different. The gasification rate for any coal increased as the volatile matter content increased.
Abstract
Various coals from many countries around the world have been used for pulverized coal boiler in power plants in Korea. In this study, the gasification reactivities of various coal chars with CO2 were investigated. Carbon conversion was measured using a real time gas analyzer with NDIR CO/CO2 sensor. In a lab scale furnace,each coal sample was devolatilized at 950℃ in nitrogen atmosphere and became coal char and then further heated up to reach to a desired temperature. Each char was then gasified with CO2 under isothermal conditions. The reactivities of coal chars were investigated at different temperatures. The shrinking core model (SCM) and volume reaction model(VRM) were used to interpret the experiment data. It was found that the SCM and VRM could describe well the experimental results within the carbon conversion of 0-0.98. The gasification rates for various coals were very different. The gasification rate for any coal increased as the volatile matter content increased.
참고문헌 (11)
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