Study of Chemical Composition of White Rice Husks and Hom Pathum Rice that were Calcined at Different Temperatures

Abstract

This research aims to study the chemical composition of different types of rice husks by using X ray Fluorescence Spectroscopy (XRF) technique. There are 2 types of rice husks prepared, white rice husk and Hompathum rice husk. Both types were calcined at 200 C, 400 C, 600 C, 800 C and 1000 C. The results showed that white rice husk and Hompathum rice contained SiO2 as the main constituent with a ratio of 92.253 and 90.951 Wt%, and elements K2O, CaO, MnO, CuO, Fe2O3 and ZnO. were also found in both types of rice husks. After calcined both types of rice husks at higher temperatures, it was found that the SiO2 content increased. Because the carbon in the rice husks, when heated, it binds with oxygen to carbon dioxide and is released into the surrounding atmosphere, thereby increasing the proportion of silica.