Reaction Kinetics of magnesite ore in dilute ethanoic acid

摘要

The leaching of naturally occurring magnesite in dilute ethanoic acid is achieved to optimize the reaction conditions affecting the reaction kinetics. In the current study effect of various reaction parameters (The particle size of ore, concentration of leaching agent, the reaction temperature and rate of stirring) on the dissolution of magnesium carbonate ore with aqueous solutions of acetic acid is probed. It is inferred that the rate of leaching reaction of magnesium carbonate ore in the aqueous solutions of acetic acid rises with a rise in temperature of reaction medium, acetic acid solution strength and decreases with the increase in particle size of the magnesite ore samples. The analysis of kinetic data done by the application of graphical and statistical approaches reveals that the leaching kinetics of magnesite ore in dilute solutions of acetic acid follows a surface chemically controlled mechanism. The calculated value of energy of activation for the dissolution reaction of magnesium carbonate in acetic acid is 46.39 kJ mol(-1).