Shahram Ghanbari Pakdehi - Chemistry and Chemical Engineering Department, Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran
Abbas Asli Soleimani

Aniline was synthesized by catalytic hydrogenation of nitrobenzene (NB) on nano-sized Pd on γ-Al2O3 catalyst prepared by sol-gel method. The catalyst was characterized by SEM and XRD. The average particle of Pd catalyst was 36 nm. In hydrogenation reaction of nitrobenzene, the hydrogenation rate was zero-order with respect to nitrobenzene 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 highdensity surface defects.

Nitrobenzene, Aniline, Nano-sized Pd on γ-Al2O3, Catalytic hydrogenation