Application of ultrasound and microwave techniques for synthesis of gamma alumina by auto-combustion

Document Type : Review

Abstract

Gamma alumina is one of the strategic materials, extensively used in the petroleum industries as catalysts and catalytic support. The present article was aimed to synthesize gamma alumina from aluminum nitrate by rapid auto-combustion technique in which urea and glycine were employed as fuels. In order to achieve this aim, the sonication and microwave techniques were applied for gel preparation and auto-combustion, respectively. The nano-sized gamma alumina powders were produced after calcination at 700 and 800 °C. The specific surface area of products was evaluated by adsorption of dye. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used for characterization of powders. The obtained results indicated that the maximum dye adsorption is obtainable by microwave combustion and calcination at 800 °C.

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References

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