• co–ru/sic impregnated with ethanol as an effective catalyst for the fischer–tropsch synthesis

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1243
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     silicon carbide containing cobalt (30 wt.%) doped with 0.1 wt.% of ruthenium catalysts prepared by incipient wetness impregnation of cobalt nitrate with either ethanol or water were tested in the fischer–tropsch synthesis (fts) in a fixed-bed configuration. the catalyst prepared with ethanol exhibits a higher fts performance compared to the one prepared with water and especially at high reaction temperature, i.e. 230 °c. the fts performance of the cobalt-based catalyst impregnated with ethanol further increases, under high temperature and high space velocity, to reach a steady state reaction rate of 0.54 gch2 gcatalyst−1 h−1, and a relatively high c5+ selectivity of about 90%. in addition, the catalyst also exhibits a relatively high stability as a function of time on stream. 59co zero field nmr analysis has indicates that the proportion of cobalt atoms engaged in the small hcp cobalt particles (<8 nm) was higher for the ethanol impregnated catalyst and also to the more homogeneous dispersion of the ruthenium atoms within the cobalt network forming an alloy.

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