Journal of the Korean Society of Combustion (한국연소학회지)

The Korean Society of Combustion (한국연소학회)
권호 표지

Gasification reactivity of Chinese Shinwha Coal Chars with Steam

스팀을 이용한 중국산 신화 석탄 촤 가스화 반응에 관한 연구

  • 강민웅 (연세대학교 기계공학과 대학원) ;
  • 서동균 (연세대학교 기계공학과 대학원) ;
  • 김용택 (연세대학교 기계공학과 대학원) ;
  • 황정호 (연세대학교 기계공학과)
  • Received : 2010.01.13
  • Accepted : 2010.03.17
  • Published : 2010.03.31
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Abstract

In this study, carbon conversion was measured using an electronic mass balance. In a lab scale furnace, each coal sample was pyrolyzed in a nitrogen environment and became coal char, which was then gasified with steam under isothermal conditions. The reactivity of coal char was investigated at various temperatures and steam concentrations. The VRM(volume reaction model), SCM(shrinking core model), and RPM(random pore model) were used to interpret experimental data. For each model the activation energy(Ea), pre-exponential factor (A), and reaction order(n) of the coal char-steam reaction were determined by applying the Arrhenius equation into the data obtained with thermo-gravimetric analysis(TGA). According to this study, it was found that experimental data agreed better with the VRM and SCM for 1,000 and $1,100^{\circ}C$, and the RPM for 1,200 and $1,300^{\circ}C$. The reactivity of chars increased with the increase of gasification temperature. The structure parameter(${\psi}$) of the surface area for the RPM was obtained.

Keywords

References

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