Oxygen release from metal oxides at high temperatures is relevant to many thermally activated chemical processes, including chemical-looping combustion, solar thermochemical cycles and energetic thermite reactions. In this study, we evaluated the thermal decomposition of nanosized metal oxides under rapid heating (~10(5) K s(-1)) with time-resolved mass spectrometry. We found that the effective...

Through isoconversional analysis of differential scanning calorimetry data, thermally induced processes glass transition and crystallization in Cux(As2Se3)100-x chalcogenide glasses (x=1, 5, 10, 15 at.%) were investigated. The characteristic values activation energy its changes during the calculated using advanced method developed by S. Vyazovkin as well forms Kissinger Moynihan relations. resu...

Thermogravimetric studies of chitin and chitosan in air atmosphere were carried out at six rates of linear increase of the temperature. The kinetics and mechanism of the thermal decomposition reaction were evaluated from the TG data using recommended from ICTAC kinetics committee isoconversional calculation procedure of Kissinger-Akahira-Sunose, as well as 27 mechanism functions. The values of ...

The data for the nonisothermal and isothermal thermal decompositions of lanthanum oxalate have been analysed using model-free model-fitting kinetic techniques. When applied to Coat-Redfern(CR) equation, widely used approach that results excellent fitting both but produces very ambiguous values Arrhenius parameters. These cannot be compared those obtained from experiments. On other hand, strateg...

In the present work thermogravimetric techniques were used to study thermal degradation of high-density cork granules. Pyrolysis experiments carried out for four heating ramps (10, 15, 20 and 25 °C.min?1), using nitrogen as carrier gas. From differential (DTG) curves it was seen that mainly occurs from 220 °C 525 main components (suberin, lignin, cellulose, hemicellulose). It also observed temp...