Abstract
Simultaneous measurement of TG-DTA and EGA using mass spectrometry (TG-DTA/MS) revealed that thermal change of cedar-based wood ceramics (WC) in helium was initiated by dehydration, which was followed by several decomposition steps. Total mass loss increased with increasing particle size of the sample. Evolution of CO2 was detected mainly throughout the reaction, while benzene, phenol and xylene were slightly observed in the middle temperature region (∼600°C), attributed to adsorbed decomposition species. Gaseous CO was distinct at higher temperatures. The results suggested that the ability of gas absorption of WC is higher than that of carbonized cedar, and characteristic water adsorption effect is observed for coarser samples. Furthermore, the results imply the presence of different gas adsorption sites.
