日本ゼオライト学会　刊行物 Publication of Japan Zeolite Association

Adsorption process that connotes the condensation of gases on free surface is intrinsically an exothermic process, therefore, evolved heats are observed as adsorption heats. Since the values of adsorption heats strongly depend on the interaction between adsorbate molecules and solid surfaces, the careful measurements and analysis of the adsorption heats provide information on the chemical and geometrical aspects of the surface. In this article, the solid surface-adsorption interaction, the adsorption heat and the fundamentals of the adsorption heat measurements are briefly summarized. Several examples of the surface characterization by the adsorption calorimetry are also introduced.