RISS 학술연구정보서비스

검색
다국어 입력

http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.

변환된 중국어를 복사하여 사용하시면 됩니다.

예시)
  • 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
  • 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
닫기
    인기검색어 순위 펼치기

    RISS 인기검색어

      검색결과 좁혀 보기

      선택해제

      오늘 본 자료

      • 오늘 본 자료가 없습니다.
      더보기
      • 무료
      • 기관 내 무료
      • 유료
      • KCI등재

        Effect of surface acidity-basicity balance in modified ZnxZryOz catalyst on its performance in the conversion of hydrous ethanol to hydrocarbons

        Hen Ohayon Dahan,Miron V. Landau,Moti Herskowitz 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.95 No.-

        ZnxZryOz and modified MuZnxZryOz (M = Si, W, Sc, Mg)/ Zn/(W-Zr) catalysts were studied in conversion ofhydrous (4 wt% H2O) ethanol at P =15 bar, T = 450 C and WHSV = 0.8-7.9 h-1. The basicity of the catalystschanged from 0.015 to 0.66 mmol/g and the acidity from 0.07 to 0.24 mmol/g resulting in a wide range ofbasicity/acidity ratio (R) of 1.3 to 7.3. Measurements of the catalysts activity, selectivity and stabilityindicate a strong dependency on the R-value. The yield of organic liquid C5-C11 increased from 17 wt% to59 wt% while the yield of light olefins C2-C4 decreased from 60 wt% to 14 wt%, as R increased from 1.3 to7.3. The content of C5-C11 iso-olefins and aromatics in organic liquid on ZnxZryOz (R = 3.9), WuZnxZryOz(R = 2.0) and MguZnxZryOz (R = 7.3) increased significantly with the residence time. ZnxZryOz was stableup to 360 h on stream, while the activity and selectivity of MguZnxZryOz and WuZnxZryOz altered after90 h on stream due to coke deposition blocking the acid and basic sites. It was proposed a comprehensivescheme of ethanol transformations routes consistent with the measured effects of the residence time,catalysts R-value and time on stream on the products distribution.

      연관 검색어 추천

      이 검색어로 많이 본 자료

      활용도 높은 자료

      해외이동버튼