The thermal decomposition of the polypropylene and liquid paraffin mixtures with inorganic additives was studied in dynamic
conditions. Thus, typical thermal analyses were carried out and thermal decomposition of samples in a specially designed apparatus
was also processed. One can observe for samples of sufficiently low mass that thermal analysis allows clear distinction of
samples that contain and do not contain liquid paraffin, respectively. Moreover, it is possible to separate two stages of
the decomposition process. The relationship between the logarithm of conversion degree and temperature (so called three-parameter
model) was used for the description of these processes. Relations between coefficients in three-parameter equation in micro-scale,
and characteristic temperatures of thermal decomposition in laboratory scale were observed in spite of meaningful differences
in the course of the processes.
Authors:Veronika Vágvölgyi, Lisa Daniel, Caroline Pinto, J. Kristóf, R. Frost, and Erzsébet Horváth
The thermal decomposition of the clay mineral attapulgite has been studied using a combination of dynamic and controlled rate
thermal analysis. In the dynamic experiment two dehydration steps are observed over the 20–114 and 114–201°C temperature range.
In the dynamic experiment three dehydroxylation steps are observed over the temperature ranges 201–337, 337–638 and 638–982°C.
The CRTA technology enables the separation of the thermal decomposition steps. Calculations show the amount of water in the
attapulgite mineral is variable. Dehydration in the CRTA experiment occurs as quasi-isothermal equilibria. Dehydroxylation
occurs as a series of non-isothermal decomposition steps. CRTA technology offers better resolution and a more detailed interpretation
of the decomposition processes of a clay mineral such as attapulgite via approaching equilibrium conditions of decomposition
through the elimination of the slow transfer of heat to the sample as a controlling parameter on the process of decomposition.
Constant-rate decomposition processes of non-isothermal nature reveal partial collapse of the layers of attapulgite as the
attapulgite is converted to an anhydride.
The European Symposium on ThermalAnalysis and Calorimetry (ESTAC) owes it origins to a decision by the UK Thermal Methods Group (TMG) to hold an international meeting on thermalanalysis in the UK, following a
Authors:F. Sahnoune, N. Saheb, B. Khamel, and Z. Takkouk
study is to investigate the kinetics of the dehydroxylation of Algerian kaolinite through thermalanalysis.
Materials and experimental procedure
Raw kaolinite (DD3, from Guelma, Algeria) was used in this investigation. More
Organic matter associated with rocks was examined by means of thermal analysis using a new methodology in oxidising conditions.
This procedure has been named “Oxyreactive Thermal Analysis” (OTA). The OTA results presented in this study characterise samples
from sedimentary rock complexes in terms of their age, and of variations in the associated organic matter arising from different
precursors and degree of severity of subsequent transformation processes to which it has been subjected.
The results of the OTA method make it possible to estimate the temperature of maturation, to describe the process of evolution
of the organic matter, and to distinguish genetic features of its carbonised and metamorphosed products.
Authors:Maurizio Ferrante, Paolo Trentini, Fausto Croce, Morena Petrini, and Giuseppe Spoto
their study, have shown the same complex polymeric structures.
The thermalanalysis is a very useful technique in order to check the quality of different commercial products and to perform a comparative analysis. In particular, it is very useful
interesting to apply these techniques to the identification and quantification of compounds and mixtures in chemical processes.
On the other hand, a number of analytic methods are used for thermalanalysis [ 5 ], including thermogravimetry
The solubility isotherm of the system Eu2O3-SeO2-H2O was studied at 100C. Certain amounts of the obtained selenites (normal and acid) were subjected to thermal analysis. The
intermediate phases were isolated and chemical and X-ray phase analysis was made. The scheme of thermal decomposition was
Thermal analysis of Israeli phosphorites by TG/DTA methods complemented with titrimetric and thermogaschromatographic determination
of the evolved gases was performed in an oxygen and inert gas flow. The amounts and temperature intervals of H2O, CO2 and SO2 evolvement were established.
Authors:Marcelo Mendes Viana, Maura Berger Maltez Melchert, Leandro Cardoso de Morais, Pedro Maurício Buchler, and Jo Dweck
production of coke adsorbents from sewage sludge combine these two purposes of environmental research [ 15 ].
A methodology is presented in this article to quantitatively estimate the produced sewage sludge coke, by using thermalanalysis. The sewage