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스팀을 이용한 중국산 신화 석탄 촤 가스화 반응에 관한 연구
강민웅(Min-Woong Kang),서동균(Dong-Kyun Seo),김용택(Yong-Tak Kim),황정호(Jungho Hwang) 한국연소학회 2010 한국연소학회지 Vol.15 No.1
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℃, and the RPM for 1,200 and 1,300℃. The reactivity of chars increased with the increase of gasification temperature. The structure parameter(Ψ) of the surface area for the RPM was obtained.
Thermo-gravimetric analysis (TGA)를 이용한 바이오매스/석탄 co-pyrolysis에 대한 연구
서동균(Dong-Kyun Seo),박상신(Sang-Shin Park),김용택(Yong-Tak Kim),황정호(Jung-Ho Hwang),류태우(Tae-U Yu) 한국연소학회 2009 KOSCOSYMPOSIUM논문집 Vol.- No.39
The co-pyrolysis synergic effect of Biomass(saw dust) and Coal(medium grade) was investigated. The TG(thermo-gravimetric)/DTG(derived thermo-gravimetric) curves were measured with thermo-gravimetric analyzer(TGA). In a lab scale furnace, four kinds of blending sample consisting of Biomass and Coal were pyrolyzed in nitrogen atmosphere under non-isothermal condition of 10℃/min. A theoretical calculation was conducted and the results ware compared with experimental results to investigate the synergic effect of Biomass/Coal on pyrolysis. SEM analysis of residue char after pyrolysis was also carried out for morphologic study. It was concluded that there is little co-pyrolysis interaction between Biomass and Coal.