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علوم نفت 2013
جزئیات رویداد
همایش ، رویداد ، ژورنال
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  • hydroisomerization performance of platinum supported on zsm-22/zsm-23 intergrowth zeolite catalyst

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1095
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     hydroisomerization catalysts pt/zsm-22, pt/zsm-23, and pt/zsm-22/zsm-23 were prepared by supporting pt on zsm-22, zsm-23, and intergrowth zeolite zsm-22/zsm-23, respectively. the typical physicochemical properties of these catalysts were characterized by x-ray diffraction (xrd), n2 absorption-desorption, pyridine-fourier transform infrared (py-ftir), transmission electron microscopy (tem), x-ray fluorescence (xrf), scanning electron microscopy (sem) and nh3-temperature programmed desorption (nh3-tpd), and the performance of these catalysts in n-dodecane hydroisomerization was evaluated in a continuous down-flow fixed bed with a stainless steel tubular reactor. the characterization results indicated that the intergrowth zeolite zsm-22/zsm-23 possessed the dual structure of zsm-22 and zsm-23, and the catalyst pt/zsm-22/zsm-23 had similar pores and weak acidity to pt/zsm-22 and pt/zsm-23 catalysts. moreover, pt/zsm-22/zsm-23 catalyst showed a high selectivity in hydroisomerization of long chain n-alkanes to mono-branched isomers. the evaluation results for n-dodecane hydroisomerization indicated that the activity of pt/zsm-22/zsm-23 was the lowest, while the hydroisomerization selectivity was the highest among the three catalysts. the maximum yield of i-dodecane product was 68.3% over pt/zsm-22/zsm-23 at 320 °c

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