Pore Structure Evolution of Lanthana–Alumina Systems Prepared through Coprecipitation

Pure Al2O3 and different compositions of La2O3–Al2O3 samples have been prepared through coprecipitation. Even after heating at 1300°C, the compositions La2O3·11Al2O3 and La2O3·13Al2O3 had higher surface area compared to the pure Al2O3 and the La2O3·Al2O3 composition. Ethanol washing is an effective way for improving the textural stability of pure Al2O3 and La2O3–Al2O3 samples. The effect of steam on the thermal stability of La2O3·11Al2O3 has also been studied. La2O3·11Al2O3 sample is found to be stable in steam.