Kinetic Analyses of Solid‐State Reactions with a Particle‐Size Distribution

摘要: Kinetic analyses for the solid-state reactions of reactant particles in an assemblage with a particle-size distribution (PSD) have been reexamined that proceed by advance reaction interfaces inward toward center individual particles. The experimental kinetic curves particle are influenced existing PSD. It has demonstrated that, even if PSD exists, reliable activation energy E can be obtained from such overall empirical isothermal analysis without accounting isoconversion methods, which enable us to determine value data points at given fractional series curves, methodologically independent is neccessary incorporate into equation select appropriate model and evaluate preexponential factor A. method calculation generalized, under any thermal profiles, extrapolating all analytical conditions infinite temperature. For characterized well-defined function, meaningful A Although ability discriminate contracting geometry interface single curve decreases increasing PSD, rate-controlling steps interface, i.e., chemical controlled or diffusion controlled, distinguised each other fairly large