محبوبترین نویسندگان :
نویسندگان مقالات پربازدید :
کاتالیزور کاربردی a: عمومی 2012
جزئیات رویداد
همایش ، رویداد ، ژورنال
اینستاگرام تی پی بین
حوزه های تحت پوشش رویداد

  • on catalyst activation and reaction mechanisms in propane aromatization on ga/hzsm5 catalysts

    نویسندگان :
    کلمات کلیدی :
    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 872
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     ga/hzsm5 catalysts prepared by incipient wetness impregnation of hzsm5 with gallium nitrate solutions and submitted to reductive and oxidative pre-treatments were studied by adsorbed pyridine ftir, in situdrifts and had their catalytic activity tested in propane aromatization reactions at 703 k with different initial hydrogen partial pressures. it is shown that dihydridogallium ions formed under hydrogen at aromatization temperatures, slowly decompose under inert gas flow and rapidly decompose when hydrogen is replaced by propane. during reduction under propane, no dihydridogallium species are observed, only alkylgallium species. dehydrogenation reactions were inhibited and hydrogenolysis activities went through a maximum with increasing hydrogen partial pressure. the results showed that dihydridogallium ions cannot be the active sites for alkane activation and that, while taking part in hydrogenolysis reactions, hydrogen competes with propane for the active sites. a possible reaction scheme for catalyst activation and the first steps in the aromatization reaction is proposed.

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 رویدادها
مقالات جدیدترین ژورنال ها