Abstract
Dispersion and decomposition of KNO3 on γ-alumina and NaY zeolite as well as Al2O3-NaY porous material were examined, and the basicity of these resulting solid bases were characterized. KNO3 was highly dispersed on zeolite NaY and AlPO4-5 but difficult to decompose, due to the lack of octahedral vacant sites in the zeolite provided for the insertion of K+ cations. If the amount of KNO3 loaded was below the monolayer dispersion threshold, it could be well dispersed and provoked a basic strength (H-) of 18.4 on the alumina. When the amount of KNO3 was above the threshold on the alumina, it only dispersed and decomposed during evacuation at 873 K but generated some unusually strong basic sites with strength (H-) of 27.0 on γ-alumina.
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