• the effect of the n atom on the dehydrogenation of heterocycles used for hydrogen storage

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1250
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the effect of the n atom on the hydrogen release rate from heterocyclic compounds was studied by comparing the dehydrogenation rate of dodecahydro-n-ethylcarbazole, dodecahydrocarbazole and dodecahydrofluorene. over a 5 wt% pd/c catalyst, hydrogen recovery was fastest (tof ∼60 min−1 at 443 k and 101 kpa) from dodecahydro-n-ethylcarbazole and ∼3 times faster than that of dodecahydrocarbazole. dodecahydrofluorene dehydrogenation was the slowest among the compounds examined, with less than 1 wt% h2 recovered after more than 20 h at 443 k, although selectivity to the completely dehydrogenated product was 95%. despite catalyst poisoning by the n in dodecahydrocarbazole and its dehydrogenated product, the presence of the n in the heterocycle increased the dehydrogenation reaction rate compared to dodecahydrofluorene, demonstrating that heterocycles are better candidates for h2 storage than polycycles.

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