Collect. Czech. Chem. Commun. 1984, 49, 2176-2186

Thermal desorption under conditions of freely occurring readsorption: A method for evaluation of the experimental data

Jan Pavlíček

J. Heyrovský Institute of Physical Chemistry and Electrochemistry, Czechoslovak Academy of Sciences, 121 38 Prague 2


A method is proposed which permits to determine the differential enthalpy, differential entropy and kinetic order of desorption from the thermal desorption experiments carried out under close-to-equilibrium conditions. The main preference of the proposed method can be seen in the possibility to use for evaluation the entire range of the desorption curve, as well as, in the unified description of the most frequently used types of heating. The approximations enabling such a unified description lead to deviations which are, in major, mutually eliminated and the resulting error is therefore negligible if compared with the accuracy of the experimental data.