화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Chemical Engineering Research, Vol.51, No.4, 418-425, August, 2013
Export Citation
금속담지 ZSM-5 촉매를 사용한 에탄올로부터 방향족 화합물 제조에 관한 제올라이트의 금속성분 및 실리카/알루미나 비의 영향
Effect of Metal Addition and Silica/Alumina Ratio of Zeolite on the Ethanol-to-Aromatics by Using Metal Supported ZSM-5 Catalyst
김한규1, 2, 양윤철1, 정광은1, 김태완1, 정순용1, 김철웅1, †, 정성화3, 이관영2
  • 1한국화학연구원 그린화학연구단, 305-343 대전시 유성구 신성로 19
  • 2고려대학교 화학공학과, 136-701 서울특별시 성북구 안암로 145
  • 3경북대학교 화학과, 702-701 대구시 북구 산격동 1370
Han-Gyu Kim1, 2, Yoon-Cheol Yang1, Kwang-Eun Jeong1, Tae-Wan Kim1, Soon-Yong Jeong1, Chul-Ung Kim1, †, Sung Hwa Jhung3, and Kwan-Young Lee2
  • 1Research Center for Green Catalysis, Division of Green Chemistry and Engineering Research, Korea Research Institute of Chemical Technology, 19 Sinseong-ro, Yuseong-gu, Daejeon 305-343, Korea
  • 2Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 136-701, Korea
  • 3Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, 1370 Sangyeok-dong, Buk-gu, Daegu 702-701, Korea
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초록
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/Al2 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(NH3-TPD)과 질소 흡-탈착실험을 수행하였다. 실험결과, 방향족화합물의 선택도에 관한 ZSM-5에 함침한 금속성분과 ZSM-5의 Si/Al2비에 크게 영향을 받았는데, 함침금속은 Zn-La > Zn > La > Cu > Ga 순으로 감소하였으며, ZSM-5의 적절한 산점을 가진 Si/Al2=50, 80에서 가장 우수하였다. 최적 반응온도(437 ℃)와 공간속도(0.8 h^(-1))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/Al2 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 (NH3-TPD) and nitrogen adsorption-desorption techniques. The results of catalytic performance revealed that the optimal Si/Al2 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 437 ℃ and WHSV of 0.8 h^(-1).
Keywords:Ethanol to Aromatics;Metal Impregnation;ZSM-5;Silica Alumina Ratio;Ethanol;Aromatics
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