Evaluation of Thermal Decomposition Kinetics of Borax Pentahydrate Using Genetic Algorithm Method by Isothermal Analysis

Authors : Ömer ŞAHİN

Pages : 197-208

View : 11 | Download : 8

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The thermal calcination of borax pentahydrate was investigated for both dehydration and decomposition steps at temperatures between 392 and 573 K in a controlled fluidized bed drier. The best kinetic parameters insert ignore into journalissuearticles values(reaction rate constants, reaction order and equilibrium values); of both steps were determined by the genetic algorithm insert ignore into journalissuearticles values(GA); method for each calcination temperature in respect of relative standard deviation. The values of the kinetic parameters showed that the dehydration step of borax pentahydrate was controlled by a homogeneous reaction of the order of about 2/3 whereas the decomposition step was controlled by a reaction order of about 1. These kinetic parameters determined by GA were also utilized to compare the experimental results with theoretical calculations. Activation energy was calculated tobe 92.88 kJ/mole and 15.94 kJ/mole for the dehydration and decomposition steps, respectively.
Keywords : Borax pentahydrate, dehydration kinetics, decomposition kinetics, genetic algorithm, fluidized bed drier, activation energy