سال انتشار: ۱۳۸۷

محل انتشار: همایش بین المللی ژئولیت ایران

تعداد صفحات: ۵

نویسنده(ها):

mostafa feyzi – Department of Chemistry, Faculty of Sciences, Sistan & Baluchestan University,
ali akbar mirzaei – Department of Chemistry, Faculty of Sciences, Sistan & Baluchestan University,
felora shayegh – Research Institute of Petroleum Industry (RIPI) Gas Division, Tehran, Iran.
neda karimpoor – Research Institute of Petroleum Industry (RIPI) Gas Division, Tehran, Iran.

چکیده:

Iron–nickel, iron-cobalt and iron-manganese catalysts to be used in the Fischer–Tropsch reaction were
prepared by co precipitation method and using ZSM-5 zeolite as a support for all catalysts. The formation of
long-chain hydrocarbons is attributed to an increased chance of the chain growth owing to a hold-up effect of
reaction intermediates, especially l-olefins, which are accumulated inside zeolite pores during the reaction.
Hydrocarbon isomers are produced over active sites of zeolite by secondary reactions, which result in a chain
shortening of the long-chain hydrocarbons. Characterization of catalysts that supported on ZSM-5 zeolite by
powder X-ray diffraction (XRD), scanning electron microscopy (SEM), BET specific surface area and thermal
analysis methods such as TGA and DSC showed that ZSM-5 zeolite influenced the catalyst precursor structure
and performance of catalyst.