• the effect of potassium on ni/al2o3 catalyst in relation to co/h2 reaction

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 895
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the effect of potassium on nickel/alumina catalysts in relation to co/h2 reaction was studied. the examinations were performed on the samples containing 90 wt.% of nickel and up to 6.0 mol% of potassium. xrd studies and adsorption measurements (h2, o2 and co) showed a small effect of potassium on nickel dispersion; at the same time potassium enhanced heat of co adsorption, which implies that the promoter locates on ni surface. temperature-programmed (tp) studies showed that potassium significantly retards the hydrogenation of pre-adsorbed co and these results were confirmed by steady state tests of co/h2reaction. tp desorption of pre-adsorbed co provided ambiguous view on the effect of potassium on co dissociation. instead, it was revealed that potassium strongly retards hydrogenation of carbon species adsorbed on nickel, which shed a new light on the effect of potassium on co/h2 reaction.

سوال خود را در مورد این مقاله مطرح نمایید :

با انتخاب دکمه ثبت پرسش، موافقت خود را با قوانین انتشار محتوا در وبسایت تی پی بین اعلام می کنم
مقالات جدیدترین ژورنال ها