• zsm-5 crystals grown on the wall of a long tubular reactor as a structured catalyst for cracking of endothermic fuels

    نویسندگان :
    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 939
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     in situ growth of zsm-5 crystals on the surface of ni-based alloy supports by hydrothermal synthesis and their mechanical, structural stability were investigated. zsm-5 crystals grown on the wall of a long (750 mm) tubular reactor with a small inner diameter (1 mm) was evaluated as a structured catalyst for cracking of n-heptane as a model endothermic fuel. the results have shown that the adhesion strength between zsm-5 crystals and the support was strong enough to resist a heating/fast-cooling cycle (the sample was immersed into water immediately after being heated to be 750 °c). the crystalline structure of zsm-5 crystals was also stable against the heating/fast-cooling cycle. the structured catalyst was shown to be catalytically active for cracking of n-heptane (lhsv = 200 h−1) at 700 °c. the formation rates of gaseous cracking products were 9.8 ml min−1 and 29.3 ml min−1 for the bare tubular reactor and the tubular reactor with zsm-5 crystals grown on the wall, respectively. these structured catalysts show high promise for cracking of endothermic fuels at high temperatures.

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