Quality and limits of a thermokinetic method to study gas—solid interactions

In order to test the qualities and limits of a thermokinetic method for the determination of adsorption rates, the adsorption of separate doses of oxygen on an initially nearly stoichiometric nickel oxide was studied at 473 K by two independent methods: calorimetry and pressure measurements.The calorimetric curves were corrected for instrumental distortion and compared with the results based on pressure curves. The following aspects of the correction procedure are discussed: determination of the instrument response function, smoothing procedure, influence of the ratio of the velocities of the instrument response and of the reaction under study.