Mesoporous aluminosilicates from coal fly ash

摘要

For the first time supernatant of the coal fly ash has been used to prepare aluminum containing MCM-48. It was found that most of the Si and Al components in the fly ash could be effectively transformed into MCM-48 when a surfactant mixture containing cationic cetyltetramethylammonium bromide, CTMABr and tetraoxyethylene dodecyl ether, C_(12)(EO)_4 is used as template. It has been observed that the fusion plays an important role in enhancing the hydrothermal condition for synthesis of these mesoporous materials. High concentration of Na ions present in the supernatant of fused fly ash is found to be not critical in the formation of Al-MCM-48 when prepared under controlled pH condition.