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• W2022695722 abstract "고정층 반응기를 사용하여 상압에서 에탄올로부터 방향족화합물 제조에 관한 ZSM-5 제올라이트의 금속성분 및 실리카/알루미나 비의 영향을 고찰하였으며, 반응온도, 중량공간속도(WHSV), 반응물인 에탄올에 물 및 메탄올 첨가 영향도 검토하였다. 촉매로는 Si/<TEX>$Al_2$</TEX> 비율이 23~280 범위의 상용 ZSM-5에 Zn, La, Cu, Ga 성분을 함침시켜 촉매 활성 및 안전성 테스트에 사용하였다. 촉매의 특성분석을 위해 암모니아 승온탈착 실험(<TEX>$NH_3$</TEX>-TPD)과 질소 흡-탈착실험을 수행하였다. 실험결과, 방향족화합물의 선택도에 관한 ZSM-5에 함침한 금속성분과 ZSM-5의 Si/<TEX>$Al_2$</TEX>비에 크게 영향을 받았는데, 함침금속은 Zn-La > Zn > La > Cu > Ga 순으로 감소하였으며, ZSM-5의 적절한 산점을 가진 Si/<TEX>$Al_2$</TEX>=50, 80에서 가장 우수하였다. 최적 반응온도(<TEX>$437^{circ}C$</TEX>)와 공간속도(<TEX>$0.8h^{-1}$</TEX>)에서 방향족화합물의 선택도는 초기 72%에서 30시간 이후 56%로 서서히 감소하는 경향을 나타내었다. The catalytic conversion of ethanol to aromatic compounds ETA was studied over ZSM-5 heterogeneous catalysts. The effect of reaction temperature, weight hourly space velocity (WHSV), and addition of water and methanol, which are the potential impurities of bio-ethanol, on the catalytic performance was investigated in a fixed bed reactor. Commercial ZSM-5 catalysts having different Si/<TEX>$Al_2$</TEX> ratios of 23 to 280 and modified ZSM-5 catalysts by addition of metal (Zn, La, Cu, and Ga) were used for the activity and stability tests in ETA reaction. The catalysts were characterized with ammonia temperature programmed desorption (<TEX>$NH_3$</TEX>-TPD) and nitrogen adsorption-desorption techniques. The results of catalytic performance revealed that the optimal Si/<TEX>$Al_2$</TEX> ratio of ZSM-5 is about 50~80 and the selectivity to aromatic compounds decreases in the order of Zn/La > Zn > La > Cu > Ga for the modified ZSM-5 catalysts. Among these catalysts from the ETA reaction, Zn-La/ZSM-5 showed the best catalytic performance for the ETA reaction. The selectivity to aromatic compounds was 72% initially and 56% after 30 h over the catalysts at reaction temperature of <TEX>$437^{circ}C$</TEX> and WHSV of <TEX>$0.8h^{-1}$</TEX>." @default.
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• W2022695722 date "2013-08-01" @default.
• W2022695722 modified "2023-10-16" @default.
• W2022695722 title "Effect of Metal Addition and Silica/Alumina Ratio of Zeolite on the Ethanol-to-Aromatics by Using Metal Supported ZSM-5 Catalyst" @default.
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