Evaluation of the relative acid strength of cerium and calcium exchanged Y zeolite by TG and DSC

Abstract The relative acid strength of cerium and calcium Y zeolite was evaluated by thermogravimetry (TG) and differential scanning calorimetry (DSC) methods, using n -butylamine as a molecular probe. The total acidity was calculated from TG curves whereas the relative acid strength given in J per acid site was determined by the DSC curves, using the Borchardt-Daniels kinetic model. The enthalpies of these processes are proportional to the acid-site strength in each specific temperature range.