Journal ArticleDOI
Self-cooling effect on the kinetics of nonisothermal dehydration of lithium sulfate monohydrate
Haruhiko Tanaka,Nobuyoshi Koga +1 more
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In this article, the effects of self cooling on the apparent kinetics of the nonisothermal dehydration of crushed crystals of lithium sulfate monohydrate were investigated using TG accompanied by DTA and power-compensation type DSC.Abstract:
The effects of self cooling on the apparent kinetics of the nonisothermal dehydration of crushed crystals of lithium sulfate monohydrate were investigated using TG accompanied by DTA and power-compensation type DSC. Linearity of the sample heating rate on the TG-DSC system is much better than that on the TG-DTA. Kinetic obedience and Arrhenius parameters obtained from the TG-DTA deviate considerably from those obtained from the TG-DSC; the latter are the more accurate due to the better linearity of the sample heating rate.read more
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ICTAC Kinetics Committee recommendations for collecting experimental thermal analysis data for kinetic computations
Sergey Vyazovkin,Konstantinos Chrissafis,Maria Laura Di Lorenzo,Nobuyoshi Koga,Michèle Pijolat,Bertrand Roduit,Nicolas Sbirrazzuoli,Joan Josep Suñol +7 more
TL;DR: In this paper, the authors present a set of recommendations for obtaining kinetic data that are adequate to the actual kinetics of various processes, including thermal decomposition of inorganic solids; thermal and thermo-oxidative degradation of polymers and organics; reactions of solids with gases; polymerization and crosslinking; crystallization of polymer and inorganics; hazardous processes.
Journal ArticleDOI
Kinetics in solids
TL;DR: How an alternative "model-free" approach to kinetic analysis, which is based on the isoconversional method, can overcome some of these limitations of the widely practiced force fitting of experimental data to simple reaction-order kinetic models is discussed.
Journal ArticleDOI
A review of the mutual dependence of Arrhenius parameters evaluated by the thermoanalytical study of solid-state reactions: the kinetic compensation effect
TL;DR: In this article, a check system for the Arrhenius parameters was proposed, on the basis of the prerequisities of the methods of kinetic calculation and the properties of the general kinetic equation.
Journal ArticleDOI
Kinetic analysis of thermoanalytical data by extrapolating to infinite temperature
TL;DR: In this article, the extrapolation of a set of thermoanalytical (TA) curves to infinite temperature is proposed as a possible method to calculate the kinetic parameters of solid-state reactions from the TA curves without assuming a constant heating rate.
Journal ArticleDOI
Thermal analysis and kinetics of solid state reactions
TL;DR: In this paper, the fundamental kinetic equations for the non-isothermal reactions are reexamined in an attempt to increase the reliability of the kinetic parameters obtained for solid state reactions, and it is suggested that reliable kinetic parameters are obtained in terms of kinetic equations with non-integral kinetic exponents.
References
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Journal ArticleDOI
A New Method of Analyzing Thermogravimetric Data
TL;DR: 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.
Journal ArticleDOI
Kinetic analysis of derivative curves in thermal analysis
TL;DR: In this article, two methods of obtaining kinetic parameters from derivative thermoanalytical curves are proposed based on the general form of kinetic formulae and are applicable to general types of reactions governed by a single activation energy.
ReportDOI
Thermophysical properties of sodium
G. H. Golden,J. V. Tokar +1 more
TL;DR: In this article, the FORTRAN subroutine computes enthalphy and entropy of sodium in given state, and composition, molecular weight, volume, and compressibility factor of corresponding vapor.
Journal ArticleDOI
The effects of sample size and heating rate on the kinetics of the thermal decomposition of CaCO3
P.K. Gallagher,D.W. Johnson +1 more
TL;DR: In this paper, isothermal and dynamic methods were used to study the rate of weight loss of CaCO3 and a pronounced dependence of the activation enthalpy, pre-exponential term, and rate constant upon sample weight and heating rate was observed.
Journal ArticleDOI
Non-isothermal kinetics and generalized time
TL;DR: In this paper, the fundamental equations for non-isothermal kinetics of various processes are reviewed, and the usefulness of this concept of generalized times is discussed, and they are found to be useful for the systematic description of nonisothermal processes as well as for prediction and control.