THE USE OF THE RISING TEMPERATURE TECHNIQUE TO ESTABLISH KINE’I-IC PARAMETERS FOR SOLID-STATE DECOMPOSITIONS A VACUUM MICROBALANCE

This study investigates the applicability of the rising temperature technique for establishing kinetic parameters in solid-state decompositions using vacuum microbalance methods. The primary objective is to address key experimental aspects affecting the apparent weight of substances under rising temperature conditions. Through a comprehensive theoretical treatment combining kinetic laws, including the Arrhenius equation, the research formulates a framework that assesses variations in reaction rates concerning temperature changes. Methodologically, the study evaluates the coefficients of rate expressions, emphasizing their reliance on specific reaction conditions. Results indicate that environmental factors significantly impact the activation energy and pre-exponential factors derived from rising temperature experiments. Notably, findings suggest discrepancies between values obtained from rising temperature analyses and traditional isothermal experiments, particularly when reaction site distributions alter. Consequently, the research underscores the necessity for careful consideration of kinetic models applied to solid-state reactions, advocating for the recognition of conditions under which Arrhenius behavior may not hold uniformly across temperature ranges. This work provides vital insights applicable in thermochemical applications and enhances the understanding of reaction kinetics under non-isothermal conditions.