การศึกษาคุณลักษณะของเซโนสเฟียร์ในเถ้าลอยจากโรงไฟฟ้าพลังความร้อน / มนัสวี เชื้อรื่น = Characterization of cenospheres in fly ashes from thermal power plants / Manasawee Chuearuen
To study characteristics of cenospheres in fly ashes from coal-fired power plants in Thailand. Fly ash samples were collected from three power plants, Mae-Moh power plant uses lignite as its energy, BLCP power station uses bituminous as its energy and National Power Supply uses bituminous and biomass as its energy. In this study, the sink and float method is used to separate cenospheres from fly ash particles. Because of cenospheres have low density and less than water. The float particles are mainly cenospheres. The cenosphere yield was observed at Mae-Moh and BLCP with 1.07% and 0.33% respectively but NPS fly ashes haven’t found cenospheres. The morphological analysis was investigated by scanning electron microscope (SEM) shown that cenospheres are hollow spherical particles and thin wall with smooth, rough and porous surface. Cenospheres density of Mae-Moh and BLCP were 0.7521 and 0.8881 g/cm³, respectively. The X-ray Diffraction (XRD) method identified that cenospheres of Mae-Moh and BLCP mainly contain mullite and calcite. The X-ray Fluorescence (XRF) analysis has found that cenospheres of Mae-Moh and BLCP contain 41.67% and 58.05% of SiO₂ and 20.50% and 22.04% of Al₂O₃, respectively.