Experimental and Theoretical Analysis of the Stability and Decomposition Kinetics of Thermo-Stable Inorganic Salts under High Temperature Conditions

Abstract

In this study, the thermal stability of inorganic salts (KNO₃, Na₂SO₄, and CaCO₃) at elevated temperatures was comprehensively investigated using thermodynamic and kinetic approaches. Thermogravimetric analysis (TGA) was employed to determine the decomposition stages, and the activation energy was calculated based on the Arrhenius model. The degree of decomposition was modeled under isothermal conditions. Based on the obtained results, a safe operating temperature range for industrial processes was established.