Kinetics and equilibria of the PdCl system

Abstract

The kinetics of the reaction between chlorine and palladium between 500 and 1100 °C at chlorine pressures from 38 to 380 Torr was studied at the Bureau of Mines. Three kinetic regions, differentiated by separate controlling mechanisms, were found. Correlations were made between the kinetic factors and equilibria involving the vaporization and decomposition of palladium chlorides. The relationships between the rate of palladium reaction R (mg h −1 cm −2), the chlorine pressure P (Torr) and the absolute temperature T (K) for the three regions were determined to be log R = 11.0 − 8620 T log( R P 4 ) = 26.6 + 21700 T and log( R P 0.8 ) = 4.72 − 6950 T .