Woodceramics has been studied as an Ecomaterial, and is expected to have applications in a wide variety of fields. In this report, thermogravimetry and differential thermal analysis of Woodceramics with changing concentration of oxygen was conducted. Experiments in chemical reaction kinetics were also performed in order to clarify the thermo-physical and thermo-chemical properties of Woodceramics in the presence of oxygen. The experimental results show that both mass loss curves and differential heat curves are dependent on the concentration of oxygen. In addition, the reaction rate law of the thermal degradation of Woodceramics with change in concentration of oxygen is reported to verify the suitability of the method.
Thermal desorption for an aromatic guest molecule of phenanthrene adsorbed in Y and X zeolites exchanged with cations such as Na ῌ , Tl ῌ and K ῌ has been studied successfully by means of TG-DTA and temperature programmed desorption (TPD)-MS. The thermal desorption of phenanthrene from the zeolites took place at temperatures between 300῏ and 800῏. The temperature of thermal desorption depended critically on the cations in the order of the temperature of Na ῌ ῎Tl ῌ ῎K ῌ . On the contrary, the activation energy for the desorption of phenanthrene estimated in terms of the Ozawa method, was almost the same for the three cation-exchanged Y zeolites with the approximate values of 120 kJ mol ῍1 . On the other hand, the activation energy for the desorption of phenanthrene from the cation-exchanged X zeolites was the larger than that obtained from the Y zeolites, and was estimated as approximately 140 kJ mol ῍1 . It is concluded that the activation energy for the desorption of phenanthrene from the zeolites does not directly correlate with the charge-compensating cation in the zeolites and depends strongly on the framework structures of the zeolites.
In recent years, solving environmental problems have been looked forward from various viewpoints. In the materials development, practical applications of Ecomaterials are desired. Ecomaterials such as Woodceramics is a material in harmony with ecosystem in consideration of material circulation, and is promising for application to various fields such as moisture sensor and electromagnetic shielding materials and so on. To clarify the structure and thermophysical characteristics of Woodceramics, we used Fourier transformation infrared spectrophotometry and elemental analysis to examine the variation due to differences in raw materials and burning temperatures. It is shown that the carbonizing process of Woodceramics can be classified to three ranges, and that the advancement of graphite crystallization starts from around 1073 K of burning temperature.
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