Synthesis of Nano Platinum-Tungsten Supported on Gamma-Alumina Catalyst

Abstract

Nano gamma-alumina support was prepared successfully by Sol-gel method using aluminum nitrate without and with carbon nanotubes as a template at different calcination temperatures (600, 650, and 700°C) and then loaded with 0.3% of platinum and 0.3% of tungsten by the wet- impregnation method. X-ray diffraction (XRD), thermal gravimetric analysis (TGA), atomic force microscope (AFM), field emission scanning electron microscopy (FE-SEM) and (BET) surface area were used to characterize the prepared nano catalyst. The best results obtained were 389.34 m2/gm surface area, 0.468 cm3 /gm pore volume, 8.07 nm pore size and 42.71 nm average particle size for the prepared nana gamma-alumina at a calcination temperature of 600°C.

Effect of Calcination Temperature on Prepared Γ-Al2O3 as Support Catalyst

“…& ( 8), indicating that the phase of gamma-alumina is not completely amorphous. The % crystallinity of the samples at 600 and 650 °C is calculated by comparing the ratio of the intensity of the peaks for the produced alumina to the corresponding ratios for the standardalumina samples [11], [12] based on the results in Table (4).…”

“…The method and techniques used to prepare alumina, as well as the calcination temperature, have a significant impact on its surface area and histological composition, which controls the extent of alumina gamma activity. [4] Many studies have already been conducted on alumina nanoparticles produced using various solution-based techniques such as sol-gel hydrothermal, microwave, and microemulsions.…”