allow the calculation of reliable values of the kinetic parameters ( E and A ). The thermodynamic (ΔH # , ΔG # and ΔS # ) and kinetic ( E, A, mechanism and model) parameters of the dehydrationreaction of AlPO 4 · H 2 O have attracted the
Authors:Hong Zhang, Zhenggang Wang, and Jiaren Dai
Correlations were determined between heat capacity and temperature and phase change enthalpy of Ba(OH)2·8H2O. The phase diagram and DSC curve of the binary system Na2CO3·10H2O−Na2HPO4·12H2O were determined The kinetics of the dehydrating reaction of Ba(OH)2·8H2O, Na2CO3·10H2O and Na2HPO4·12H2O were measured and theoretically analyzed by TG.
The dehydration of LiCl·H2O was studied under inert helium atmosphere by DTA/TG for different heating rates. The dehydration of LiCl·H2O proceeds through a two step reaction between 99–110 and 160–186°C, respectively. It leads to the formation of LiCl·0.5H2O as intermediate compound. The proposed mechanism is:
Based on the temperature peak of the DTA signals the activation energies of the two reactions were determined to be 240 kJ
mol−1 (step 1) and 137 kJ mol−1 (step 2), respectively.
Authors:Y. Pan, X. Guan, Z. Feng, Y. Wu, and X. Li
A new method was proposed for determining the most probable mechanism function of a solid phase reaction. According to Coats-Redfern's
integral equation Eβ→0 was calculated by extrapolating β to zero using a series of TG curves with different heating rates. Similarly, Eα→0 was calculated according to Ozawa's equation. The most probable mechanism function of the solid phase dehydration of manganese(II)
oxalate dihydrate was confirmed to be G(α)=(1-α)1/2 by comparing Eα→0 with Eβ→0.
–DTA-derivative thermogravimetry (DTG) techniques, in air, up to the formation of strontium oxide (SrO) [ 7 ].
Kinetic studies on the thermal dehydrationreactions of several compounds are reported in the literature [ 8 – 21 ]. For instance, Torres-Garcia et al. [ 8
Authors:N. Obradović, A. Terzić, Lj. Pavlović, S. Filipović, and V. Pavlović
sintering and ceramic bonding [ 2 ].
This article is concerned with investigation of dehydrationreactions which occur from the moment when water is added (at the beginning of components mixing), to the moment when installed refractory concrete