PREPARATION AND CHARACTERIZATION OF HEXAALUMINATE-BASED MATERIALS FORCATALYTIC COMBUSTION

A simple preparation method for barium hexaaluminate-based catalysts t o be used in catalytic combustion is described. Morphological and phys ico-chemical characterization data are given for Ba-Al-O (with Ba/Al=1 /12) and for Ba-Mn-Al-O (with Ba/Mn/Al= 1/0.5/11.5; 1/1/11; 1/2/10) sa mples calcined at different temperatures. The preparation method here proposed provides stable materials with a surface area of 15 m(2)/g af ter calcination at 1400 degrees C. The structural and morphological pr operties, ae well as the results of activity tests in methane combusti on, compare well with those reported in the literature for samples wit h the same composition and prepared according to a more complex prepar ation route.