Characterization and Ehition Behaviors of Organically Associated Minerals in Coals During Acid Treatment and Solvent Extraction

摘要

Mineral components bonded to organic parts in coals are characterized for understanding their behaviors during heating, solvent extraction, and acid treatments. Major inorganic components in coals are mineral and clay matters, however, some portions of metals bonded to organic parts in coals through oxygen functional groups are contained, especially in lower ranked coals. It is revealed that some portions of aluminosilicates are organically bonded and extracted by mild acid treatment at room temperature or solvent extraction at high temperatures around 350℃. In addition to ion-exchangeable cations such as alkali and alkali-earth metals, such aluminosilicates may also influence the deposition problems through their intimate interactions with organic hydrocarbons in coals during heating and solvent extraction around at high temperatures.