The Study And Application Of Temperature Programmed Dymamic Analysis In Heterogeneous Catalysis And Other Fields

1 Temperature Programmed Desorption (TPD)According to the boundary conditions of the experimental curves of TPD, the D-M distribution functiom is presented, which can describe the relationship between peak height of TPD curve and temperature:H(T)=K(T-T_O)^a(T_f-T)^be^-c(T-T_m)2By this distribution function, we can analyze theTPD curve with an ideal peak and find the solution of differetial equation under the condition of linear rise in temperature with time. After then, the kinetic parameters of desorptlom, such as order, activation energy and preexponential factor, can be calculated conveniently, when there is a complex shape of TPD curve with tailing, the D-M distribution function can be used to evaluate the...