RPF의 열적 안정성과 한계발화온도 = Thermal Stability and Critical Ignition Temperature of RPF

다국어 초록 (Multilingual Abstract)

It is important to understand thermal characteristic as a method to estimate the new materials,
because spontaneous ignition characterized by causing combustion in the low temperature without
ignition source. If can not find out the thermal characteristics of materials, it is frequent that causes
of fires could not be found. The danger level of spontaneous ignition material should be estimated
and by closely studying its thermal characteristic. However, RPF (Refuse Paper & Plastic Fuel) is a
solid matter and getting increasesa year by year because it is an economy profit as alternative energy
for limited fossil fuels. Some time RPF occur a fire in the cases of its production process and conservation.
Therefore study for thermal stability and critical ignition temperature of RPF was so imperative
that the experiment by means of Bombe Calorimeter, TG-DTA, MS80, SIT-II, and Wire Basket
Test was implemented. As a result, RPF had a caloric value 26.4-28.3 MJ/kg, and its initial pyrolysis
temperature was 192 oC at heating rate 2 K/min. With the result of analysis by MS 80 which is an
instrument measuring microscopic calory, pure RPF not containing water has higher caloric value than
RPF containing 20% water. Also, SIT-IIwhich is an instrument of insulated auto-ignition was ignited
by 118.5 oC. This temperature is lower than that of Wire Basket Test. The critical ignition temperature
was calculated by Frank-Kamenetskii equation can cause ignition at 80 oC when conserved in the
height of 10 m by the standard of infinity slab.

국문 초록 (Abstract)

재생연료 중에서 고체물질에 해당하는 RPF(Refuse Paper & Plastic Fuel)는 친환경적인 요소와 한정된
지하자원에 대한 대체에너지로서 세계적으로 그 사용량이 증가하는 추세에 있으며, 제조 또는 저장과정에
서 종종 화재가 발생하기도 한다. 따라서 RPF에 대한 열적안정성과 임계발화온도에 대한 연구가 필요하
며, 이러한 연구를 수행하기 위하여 봄베 열량계, TG-DTA, MS80, SIT-II, Wire Basket를 이용하여 실
험을 하였다. 그 결과 RPF는 26.4-28.3 MJ/kg의 발열량을 지니고 있었으며, TG-DTA로 초기 열분해 온
도를 측정한 결과 승온속도 2K/min에서 192 oC로 나타났으며, 미소열량 측정 장치인 MS80으로 분석한
결과 수분이 함유되지 않은 순수한 RPF가 수분이 20% 함유된 RPF 보다 발열량이 더 큰 것으로 나타
났다. 또한 단열자연발화 실험장치인 S I T-II가 Wire Basket Test 보다 낮은 온도인 118.5 oC까지 발화하
였으며, Frank-Kamenetskii의 식으로부터 계산되어진 한계발화온도는 무한평판을 기준으로 약 10m 높이
로 저장되어 있을 때, 80 oC에서도 발화가 가능한 것으로 나타났다.

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