A New Method of Analyzing Thermogravimetric Data
TLDR
In this paper, a new method of obtaining the kinetic parameters from thermogravimetric curves has been proposed, which is simple and applicable to reactions which can not be analyzed by other methods.Abstract:
A new method of obtaining the kinetic parameters from thermogravimetric curves has been proposed. The method is simple and applicable to reactions which can not be analyzed by other methods. The effect of the heating rate on thermogravimetric curves has been elucidated, and the master curve of the experimental curves at different heating rates has been derived. The applications of the method to the pyrolyses of calcium oxalate and nylon 6 have been shown ; the results are in good agreement with the reported values. The applicability of the method to other types of thermal analyses has been discussed, and the method of the conversion of the data to other conditions of temperature change has been suggested. From these discussions, the definition of the thermal stability of materials has been criticized.read more
Citations
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Comparative study of the thermal decomposition of pure cellulose and pulp paper
TL;DR: In this paper, the thermal decomposition of pure cellulose, either powder or paper, and of pulp Kraft paper was studied by thermogravimetry, differential scanning calorimetry and characterisation of the degradation products.
Journal ArticleDOI
Crystallization of amorphous calcium carbonate
TL;DR: In this paper, the enthalpy change and activation energy of the crystallization process increased with increasing pH value of sample preparation, ranging from 3.99 to 12.26kJ(mol CaCO 3 ) −1 and from 151.6 to 304.1kJ (kJ)mol −1, respectively.
Journal ArticleDOI
Applicability of friedman plot
TL;DR: In this article, it was shown that the Friedman method for estimating the activation energy of chemical reactions by using both the conversion and the rate in the thermoanalytical data has wide applicability to crystal growth from pre-existing nuclei, diffusion and other processes in which a single unit process is involved.
Journal ArticleDOI
Integral, differential and advanced isoconversional methods: Complex mechanisms and isothermal predicted conversion–time curves
TL;DR: In this paper, it was shown that the assumption of a constant activation energy is a key parameter that must be considered in the case of a complex reaction mechanism leading to a great variation of the effective activation energy on conversion.
Journal ArticleDOI
Kinetic study of Chinese biomass slow pyrolysis : Comparison of different kinetic models
TL;DR: It was found that the three-pseudocomponent model with n-order kinetics ( model II) is more accurate than the model with first-order Kinetics (model I) and this model is more realistic with respect to the chemical interpretation of the reaction order.
References
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Journal ArticleDOI
Kinetic Parameters from Thermogravimetric Data
A. W. Coats,J. P. Redfern +1 more
TL;DR: In this article, a thermocouple is used to measure the sample temperature in a Stanton HT-D thermobalance, the bead of which is positioned in or near the sample, depending on crucible design.
Journal ArticleDOI
A New Analysis of Thermogravimetric Traces.
H. H. Horowitz,Gershon. Metzger +1 more
Journal ArticleDOI
The Application of Thermoanalytical Techniques to Reaction Kinetics: The Thermogravimetric Evaluation of the Kinetics of the Decomposition of Calcium Oxalate Monohydrate
Eli S. Freeman,Benjamin Carroll +1 more
Journal ArticleDOI
Kinetic analysis of thermogravimetric data
TL;DR: The kinetic analysis of the thermogram, by use of either its exact equation or a more convenient approximation formula, is straightforward in cases of volatilization via simple kinetics as mentioned in this paper.
Journal ArticleDOI
Estimating isothermal life from thermogravimetric data
TL;DR: In this paper, the authors presented a method for estimating equivalent isothermal life from thermogravimetric data and for estimating the apparent activation energy for volatilization even though the nature of the kinetic process is unknown.
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