سال انتشار: ۱۳۸۶

محل انتشار: پنجمین کنگره بین المللی مهندسی شیمی

تعداد صفحات: ۹

نویسنده(ها):

Shahram Ghanbari Pakdehi – Chemistry and Chemical Engineering Department, Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran
Mahboubeh Salehi Pour – Imam Khomeini Technical School, Electronics group, Tehran, Iran

چکیده:

Aniline was prepared by catalytic hydrogenation of nitrobenzene (NB) on nano-sized Pd/γ-Al2O3 catalyst synthesized by sol-gel method. The catalyst was characterized by SEM, XRD and TEM. The average size of Pd particles was 36 nm. In this reaction, the hydrogenation rate was zero-order with respect to nitrobenzene concentration and increased with increasing of hydrogen pressure. Compared with commercial Pd/γ-Al2O3, catalytic activity and selectivity of the as-prepared Pd/γ-Al2O3 is superior. The reason proposed for higher catalytic activity of nano-sized Pd is the small particle size and high-density surface defects.