COMPUTER-SIMULATION OF DERIVATIVE TPD

In this paper, the advantages of employing a Derivative Temperature-Pr ogrammed Desorption (DTPD) curve in TPD analysis are demonstrated. Bas ed on a series of theoretical DTPD curves obtained by computer simulat ion with double assumption of zero signal noise and no temperature gra dients across the sample, a comparison is made between the TPD and DTP D curves, and it is found that the approach can (a) estimate desorptio n order, (b) raise resolving power, and (c) eliminate baseline drift. The equations for calculating kinetic parameters from DTPD curves are also presented. The results show that these equations are valid.