Author/Authors :
Cheng، نويسنده , , Jun and Zhou، نويسنده , , Junhu and Liu، نويسنده , , Jianzhong and Cao، نويسنده , , Xinyu and Zhou، نويسنده , , Zhijun and Huang، نويسنده , , Zhenyu and Zhao، نويسنده , , Xiang and Cen، نويسنده , , Kefa، نويسنده ,
Abstract :
The sulfur-retention properties, mineralogical compositions, porosities and surface morphologies of two Chinese high-calcium coal ashes are studied by XRD, SEM and porometer analysis. It is found that the active calcium (CaCO3 and CaO) content in Shenmu coal ash prepared at 800 °C is 22.40% and its sulfation product (CaSO4) content is 17.79%, which are both higher than those in Huangling coal ash (respectively, 4.48% and 4.92%). With an increase in furnace temperature from 800 to 1200 °C, the porosity parameters of these two coal ashes dramatically decrease due to their intensely melting and no calcium compounds are found.
Keywords :
coal ash , Sulfur retention , Calcium , XRD , SEM
