Apparent kinetic behavior of the thermal decomposition of synthetic malachite.

The kinetic behavior of the thermal decomposition of synthetic malachite was investigated by means of CRTA under different conditions of reduced pressure, flowing gases and quasi-isobaric atmospheres The thermal decomposition was found to proceed at lower temperatures under the influence of the self-generated gases, CO2 and H2O From a viewpoint of chemical equilibrium, the normal and opposite effects on the overall kinetics were observed for the self-generated CO2 and H2O, respectively The complexity of the present reaction is also reflected by the variations of the apparent kinetic parameters which depend on the applied and self-generated atmospheric conditions The practical usefulness of CRTA when applied to a complicated thermal decomposition is discussed as exemplified by the kinetic approaches to the present reaction

Kinetic Analysis of the Thermal Decomposition of Synthetic Malachite by CRTA

The thermal decomposition course of copper acetate monohydrate (CuAc) was examined on heating up to 600°C at various rates, by TG, DTA and DSC. Non-isothermal kinetic and thermodynamic parameters were determined in air or nitrogen. SEM was used to describe the decomposition course and the solid products were identified by IR and XRD analysis. The results indicated that CuAc was dehydrated at 190°C and then partially decomposed at 220°C, giving rise to CuO in addition to a minor portion of Cu2O and Cu4O3. The last two oxides seemed to facilitate the decomposition of the rest of the anhydrous acetate. Cu2O and Cu4O3 were oxidized in air at >400°C, in a process that did not occur in nitrogen.

Thermoanalytical investigations of the decomposition course of copper oxysalts. III: Copper(II) acetate monohydrate

Thermal decomposition of basic copper carbonate, CuCO3 · Cu(OH)2 · H2O, in carbon dioxide atmosphere (0–50 atm)

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V.D. Zlatković

Papers

Kinetics of thermal decomposition of copper basic carbonate: Part I. The analysis of thermogravimetric data