• hydroisomerization of saturated hydrocarbons with novel mcm-41 immobilized re(v) complex catalysts

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 946
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the hetero-functionalized phosphines hpn2, h2pno and hpn-pip containing tricarbonyl re(v) complexes,i.e. [re(co)33-pn2)] (i), [re(co)3br(κ2-h2pno)] (ii) and [re(co)3br(κ2-hpn-pip)] (iii) were covalently bonded to modified and mcm-41 to obtain novel supported hybrid catalysts. remarkable high catalytic effects were observed with these catalysts in the hydroisomerization of n-alkanes at low temperature. the catalyst ii/mcm-41 provided the highest tons 3.32 × 103 with 37% yield for n-hexane and 3.18 × 103 with 30% yield for n-heptane. under optimized condition, good selectivities for n-hexane (85%) and for n-heptane (91%) were obtained. the tga was used to evaluate the stability of catalysts and reusable for several cycles. a possible carbenium-based mechanism been used to explain product formation.

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