Structural and textural properties of the NiOAl 2O 3 catalyst

Abstract

Influence of nickel oxide loading (5; 10; 20 wt% Ni) and temperature of heat treatment (400, 700, 1100°C) on the structure, texture and reducibility of coprecipitated NiOAl 2O 3 catalyst was investigated. X-ray diffraction (XRD), diffuse reflectance spectroscopy (DRS), low temperature nitrogen adsorption (LTNA) and hydrogen reduction confirmed significant changes in physico-chemical properties as the function of mentioned variables. The results showed that the interactions in coprecipitated NiOAl 2O 3 system are intensive even at 400°C. At 700°C the observed interactions in coprecipitated NiOAl 2O 3 system are surface area, reducibility and the coordination of Ni(II), while at 1100°C treatment intensive structural and textural changes were registered.