Journal of Petroleum & Environmental Biotechnology

Preparation of different nanocrystalline gamma alumina support using cationic surfactant

3^rd World Congress on Petrochemistry and Chemical Engineering

November 30-December 02, 2015 Atlanta, USA

Mandana Akia

Chemistry and Chemical Engineering Research Center of Iran, Iran

Posters-Accepted Abstracts: J Pet Environ Biotechnol

Abstract:

In this research two different nanocrystalline gamma alumina were synthesized by the sol-gel method using cationic surfactant. Aluminium isopropoxide, hexadecyltrimethyl ammonium bromide and nitric acid have been used as raw materials for support preparation and two calcination temperature of 600 and 700°C selected for alumina synthesis. The samples were characterized by X-ray diffraction (XRD), N2 adsorption (BET) and transmission electron microscopy (TEM). The XRD patterns of the prepared samples at different temperature indicated that with increasing the calcination temperature the intensities of the peaks slightly increased, which showed the high thermal stability of the prepared gamma alumina support. Both supports showed type IV isotherm according to the IUPAC classification. The BET surface area decreased with increasing calcination temperature. The size of particles ,which calculated by BET data and also by the Scherrer equation, showed increasing the particle and crystal sizes with increasing the calcination temperature. The TEM results revealed different structure for the synthesized gamma alumina samples with the changes in calcination temperatures. The TEM images for both supports also confirmed the nanocrystallinity of the synthesized γ -Al2O3 samples.

Biography :

Email: akia.mandana@gmail.com