To help evaluate the applicability of a particular catalyst, Temperature Programmed Desorptions (TPD’s) are commonly performed. TPD’s of basic molecules from the surface of zeolites have been extensively used to measure their acid properties. The TPD experiment consists of sorbing a base molecule on the material of interest and, while flushing the surface with an inert gas, linearly ramping the temperature and measuring the desorption of the base. By quantitatively measuring the amount of base desorbed and noting the temperature(s) of desorption, information can be obtained on both the intrinsic and extrinsic acid properties in a single experiment.