Relationship between volatilization of hazardous trace elements and their occurrences and combustion temperatures during coal combustion

During coal combustion, some hazardous trace elements volatilize from combustion furnaces into the atmosphere and pollute the environments. In this paper, the significance of the relationships between the emission of hazardous trace elements, and their modes of occurrence and combustion temperatures is analyzed. On the basis of combustion experiments under different temperatures and the calculation of volatilization of trace elements, it is stated that the volatilization of hazardous trace elements is controlled by combustion conditions, especially combustion temperature during coal combustion. The higher the combustion temperature is, the more volatilization of hazardous trace elements is. The volatilization of hazardous trace elements is closely related with their modes of occurrences in coal. Hazardous trace elements with organic occurrences are easy to emit out because their molecular structures are easily destroyed during coal combustion.