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담지된 Ru게 촉매를 이용한 n-Heptane의 수소화 분해반응과 이성화반응의 특성
A Study of Hydrocracking and Hydroisomerization of n-Heptane over Supported Ru Catalysts
HWAHAK KONGHAK, June 1990, 28(3), 255-263(9), NONE
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Abstract
Ru/La-Y계 촉매를 이용하여 n-heptane의 수소화 분해반응과 이성화반응 특성을 연구하고 하였으며, 실험장치는 고압고정층 연속흐름식 촉매반응 장치인 CATATEST가 사용되었다. 수첨기능이 우수한 코발트와 니켈이 이원소촉매의 한 원소로 사용되었다. 실험결과로서 활성도 크기는 Ni-Ru>Co-Ru>Ru 순이었으며, 이원소촉매로서 코발트와 니켈이 담지된 촉매는 수소화 분해반응과 이상화반응의 활성도를 증가시켰으며, 이차 분해반응을 크게 억제하였다. 모든 촉매상에서 일어난 반응은 탄소양이온 반응기구에 의해 분해되었으며, 니켈과 코발트가 첨가된 촉매는 촉매표면의 코크형성을 억제하였다. 촉매 불활성화 실험을 통하여 촉매표면의 코크와 활성점의 비가역결합과 활성점의 소결현상이 촉매의 불활성화 요인으로 확인되었으며, 니켈과 코발트 원소에 의해 불활성화를 크게 억제시켰다. 또한 각 촉매상에서 전체반응에 대한 turnover number를 비교한 결과, 모든 반응을 structure-sensitive 반응으로 밝혀졌다.
The hydrocracking and hydroisomerization of n-heptane were studied over Ru/La-Y based catalyst, and as an experimental apparatus a CATATEST minipilot licensed by IFP was used in this study. Co and Ni were used as promoters, so the effects of promoters impregnated into the prepared catalyst were observ-ed. The results showed that the order of the magnitude of activity of each catalyst was Ni-Ru>Co-Ru>Ru-catalysts, and that the promoters Ni and Co increased the activity of hydrocracking and isomerization, and they had an in-hibiting effect on the secondary splitting. Through an experiment on the deactivation of catalysts, it was confirmed that coke formation on the catalysts sur-face and sintering of active sites deactivated the catalysts. In a study of the turnover number of each catalyst used in hydrocracking, it was revealed that all of the reactions were structure-sensitive.
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