Synthesis of zeolite Li-ABW from fly ash by fusion method.
The zeolite Li-ABW was synthesized by fusion method using fly ash as raw material. It comprised alkaline fusion followed by hydrothermal treatment in LiOH x H2O medium. Crystallinity of zeolite as high as 97.8% was attained under the following conditions: LiOH x H2O concentration, 3M; hydrothermal temperature, 180 degrees C; the corresponding aging time, 12 h. The content of Li-ABW increased at the expense of lithium aluminum silicate or quartz with an increase of LiOH x H2O concentration. With increasing hydrothermal temperature and aging time, the soluble species re-crystallized and crystalline phase transformation between different zeolites was observed. Scanning electron microscopy (SEM) observation revealed that the obtained zeolite Li-ABW was a rod-like crystal. The pore size distribution curve indicated the presence of mesopores.
Yao
Z T
ZT
Department of Earth Science, College of Science, Zhejiang University, Hangzhou 310027, PR China.
Xia
M S
MS
Ye
Y
Y
Zhang
L
L
D000327:Adsorption; D000395:Air Pollutants, Occupational / Q000032:analysis*; D000468:Alkalies; D002244:Carbon / Q000032:analysis*; D060729:Coal Ash; D004055:Differential Thermal Analysis; D018020:Lithium Compounds; D008855:Microscopy, Electron, Scanning; D009584:Nitrogen / Q000737:chemistry; D052638:Particulate Matter / Q000032:analysis*; D016062:Porosity; D013052:Spectrometry, X-Ray Emission; D013055:Spectrophotometry, Infrared; D017550:Spectroscopy, Fourier Transform Infrared; D013816:Thermodynamics; D014961:X-Ray Diffraction; D017641:Zeolites / Q000138:chemical synthesis*
D000395:Air Pollutants, Occupational; D000468:Alkalies; D060729:Coal Ash; D018020:Lithium Compounds; D052638:Particulate Matter; D017641:Zeolites; D002244:Carbon; C028467:lithium hydroxide; D009584:Nitrogen