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입상활성탄의 자연발화 예측에 관한 연구
A Study on Spontaneous lagintion Estimation of Granulated Activated Carbon
HWAHAK KONGHAK, October 1993, 31(5), 538-546(9), NONE
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Abstract
입상활성탄을 시료로하여 주위온도를 일정하게 한 경우와 주위온도를 정현곡선상으로 변화시켰을 때의 발화한계 특서을 연구하였다. 그 결과 주위온도를 일정하게 했을 때의 발화한계온도는 용기의 크기가 클수록 낮아지는 경향을 나타내었으며, Frank-Kamentskii의 열발화 방정식으로부터 구한 겉보기 활성화에너지는 38.82(Kcal/mol)을 얻었다. 주위온도를 정현곡선상으로 변화시켰을 때의 발화한계온도는 일반적으로 주위온도를 일정하게 한 경우보다 낮게 나타났으며, 진폭 5℃ 및 10℃에서는 주기가 1.0시간일 때 발화한계온도의 최저치를 나타내었고, 진폭 15℃의 경우는 주기가 2.0시간일 때 최저치를 나타내었다. 본 실험에서 얻은 결과로부터 Frank-Kamentskii의 parameter δc(ε,ω)의 근사식을 구하였다.
The characteristics of critical spontaneous ignition of granulated activated carbon were investiga-ted at a constant ambiemt temperature and sinusoidally varying ambient temperatures. At a constant ambient temperature, but larger vessels yielded the lower critical spontaneous ignition temperature. The apparent activation energy calculated by the Frank-Kamenetskii’s thermal ignition theory was 38.82(kcal/mol). At sinu-soidally varying ambient temperatures, the critical spontaneous ignition temperature was generally lower than that measured at the constant ambient temperature. For the amplitudes 5℃ and 10℃, a period of 1hour showed the minimum the of the critical spontaneous ignition temperature, and for the amplitude of 15℃, a period of 2 hours showed the minimum value of the critical spontaneous ignition temperature. The Frank-Kamenetskii’s δc(ε,ω) was determined from the results.
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