Staff Members - Benha University
KINETICS OF SOLID STATE REACtIONS Co2+,Cu2+AND Zn2+ BASIC CARBONATES WITH SOME ALIPHATIC ACIDS.
Journal of Thermal Analysis and Calorimetry • 2000
Publication Information
Authors
M. A. Moustafa, Z. A. Omran, W. A. A. Bayoumy and M. A. Mousa
Keywords
composition effect, kinetic of solid, organic acid diffusion.
Journal
Journal of Thermal Analysis and Calorimetry
Publisher
M. A. Mousa
Volume
63
Issue
Solid State
Pages
609-616
publication.type
International
Paper Link
Not Available
Supplementary Materials
Not Available
Abstract
The kinetic description and mechanism of the solid-state reactions between metal basic carbonate (M=Co2+ ,Cu2+ and Zn2+) and aliphatic carboxylic acids (oxalic, tartaric, succinic and citric acids)
were studied using non-isothermal analysis (TG, DTA) and capillary techniques. The reactions were found to proceed in all cases (except citric acid) by one mole of metal carbonate and two moles of metal carbonate and two moles of organic acid. The kinetic analyses of non-isothermal data were best described by each of the dimensional phase boundary R2 and two-dimensional diffusion con-
trolled reactions D2 . While the capillary technique showed that the initial reaction occurs at the phase boundary of the reactants and kinetically of the reacting controlled by diffusion mechanism in which the diffusion species through the product layers are the organic acids.
were studied using non-isothermal analysis (TG, DTA) and capillary techniques. The reactions were found to proceed in all cases (except citric acid) by one mole of metal carbonate and two moles of metal carbonate and two moles of organic acid. The kinetic analyses of non-isothermal data were best described by each of the dimensional phase boundary R2 and two-dimensional diffusion con-
trolled reactions D2 . While the capillary technique showed that the initial reaction occurs at the phase boundary of the reactants and kinetically of the reacting controlled by diffusion mechanism in which the diffusion species through the product layers are the organic acids.