15.石炭ガス化過程におけるイオン交換性金属の挙動

抄録

Ash particles in gasified coal chars were analyzed by a computer-controlled scanning electron microscope (CCSEM) to understand the fate of organically associated metal, especially organically associated calcium, during gasification. From the CCSEM analysis, it was found that organically associated calcium was first converted into fine Ca-containing fine particles during devolatilization process and then the fine particles interacted with kaolinite to form complex aluminosilicate during gasification. Such Ca-containing aluminosilicates would promote coalescence or agglomeration of mineral particles.