• جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1240
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     we showed previously that unsupported catalysts prepared from amine thiomolybdates incorporated with bivalent metals (fe, ni, co) are highly active for hydrodenitrogenation (hdn) and hydrodesulfurization (hds). in particular, an iron-promoted molybdenum sulfide catalyst gives a much higher hdn-to-hds activity ratio than commercial supported catalysts. the present study examines trivalent chromium as a promoter for mos2. the catalyst precursors are synthesized via two routes: one involves olation, the other chelation. tests with a catalytic cycle oil show that the behaviors of the cr-containing catalysts prepared from the two routes are qualitatively similar. chromium is a more effective hdn promoter than iron. the fe0.5cr0.5moy(1 ≤ y ≤ 1.5) trimetallic sulfide is more active and selective for hdn than femo and crmoy bimetallic sulfides. the predominant phase in the chromium-containing catalysts comprises nanocrystalline mos2 and amorphous cr2s3.

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