Journal of the Korean Industrial and Engineering Chemistry, Vol.18, No.5, 511-515, October, 2007
등온 열분해 반응기에서 폐촉매를 이용한 선박용 폐윤활유의 열분해반응 특성 연구
Pyrolysis Characteristics of Waste Ship Lubricating Oil using Waste Catalyst in Isothermal Tubular Type Pyrolysis Reactor
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초록
Tubular 형의 반응기를 이용한 선박용 폐윤활유의 등온실험에서 열분해 온도가 440 ℃에서는 400 ℃와 420 ℃일 때보다 오일의 전환율이 급격하게 증가하였고 분해반응은 30 min 이내에 대부분 완료되었다. 반응온도 증가에 따라서 기체의 수율은 감소하는 경향을 나타냈으며, 고체 수율은 거의 변화가 없는 것을 확인할 수 있다. 석유화학공정으로부터 배출되는 ZSM-5 폐촉매를 사용하여 선박용 폐윤활유의 열분해반응 특성 연구를 수행하였다. Used ZSM-5와 fresh ZSM-5 촉매를 사용했을 경우에 촉매가 없는 조건에서보다 기체의 수율이 현저하게 높은 것을 확인할 수 있다. 동일한 온도에서 fresh ZSM-5 촉매와 used ZSM-5 촉매의 액체 및 기체 생성량에는 거의 변화가 없었다. 반응온도 400∼440 ℃에서 fresh ZSM-5와 used ZSM-5 촉매를 사용하여 반응실험을 한 경우 촉매를 사용하지 않았을 때보다 C5-C11에 해당하는 탄화수소화합물의 선택성이 2배 정도 증가하였다.
The yield of oil was rapidly increased at 440 ℃ compared to 400 ℃ and 420 ℃ when the isothermal pyrolysis of waste ship lubricating oil was carried out in tubular type reactor, and pyrolysis was almost finished within 30 min. The yield of gas was decreased depending on the reaction temperature in which that of solid was not much changed. Pyrolysis experiments of waste ship lubricating oil were carried out with used ZSM-5 produced from a petrochemical process. The yield of gas was highly increased in the case of used ZSM-5 and fresh ZSM-5 compared to the case without catalyst. The produced oil and gas were almost constant for fresh ZSM-5 and used ZSM-5 at the same reaction temperature. In the reaction temperature 400∼440 ℃, the selectivity of C5-C11 was two times higher with fresh ZSM-5 and used ZSM-5 than the case without catalyst.
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