Effect of the combustion process on the structure of rice hull silica

摘要: Abstract The study was carried to clarify the effect of thermal decomposition rice hulls on amorphous structure silica ash. ash obtained by at temperatures in range 500–1150°C for one hour evaluated X-ray diffraction. prepared comparatively lower (500–600°C) still consists silica. Cristobalite detected 800°C. At 1150°C, both cristobalite and tridymite were present. produced combustion a fixed bed different air rates evaluated. present case low rates. higher rates, crystallization takes place. results optimum conditions production beds.