Abstract: Anew method for solid acid-base strength distribution measurement is suggested.We used CO₂ as the adsorption gas for determining base strength distribution and NH₃ as the adsorption gas for determining acid strength distribution.We suggest that we can use,△H/Tto represent the acid and base strengthes, and the amounts of adsorbed gases to represent the acidity and basicity.The results obtained by this new method are almost the same as that of the titration method using Hammett indeca-tor.This method can be used not only for calorless catalysts but also for calorful catalysts without using any solvent.We can also inspect the acid-basic qualities of industrial catalysts at the condition close to that catalytic reaction.

Key words: Solid catalyst, Measurement, Acid-base strength distribution