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·H 2O medium. Crystallinity of zeolite as high as 97.8% was attained under the following conditions: LiOH·H 2O concentration, 3 M; hydrothermal te...

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Bibliographic Details
Published in:Journal of hazardous materials 2009-10, Vol.170 (2), p.639-644
Main Authors: Yao, Z.T., Xia, M.S., Ye, Y., Zhang, L.
Format: Article
Language:English
Subjects:
Adsorption
Air Pollutants, Occupational - analysis
Alkalies
Applied sciences
Carbon - analysis
Coal Ash
Crystal structure
Crystallinity
Crystals
Differential Thermal Analysis
Exact sciences and technology
Fly ash
Fusion method
Lithium aluminum silicates
Lithium Compounds
Lithium hydroxide monohydrate
Microscopy, Electron, Scanning
Nitrogen - chemistry
Particulate Matter - analysis
Pollution
Porosity
Raw materials
Scanning electron microscopy
Spectrometry, X-Ray Emission
Spectrophotometry, Infrared
Spectroscopy, Fourier Transform Infrared
Thermodynamics
X-Ray Diffraction
Zeolite Li-ABW
Zeolites
Zeolites - chemical synthesis
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Summary: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·H 2O medium. Crystallinity of zeolite as high as 97.8% was attained under the following conditions: LiOH·H 2O concentration, 3 M; hydrothermal temperature, 180 °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·H 2O 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.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2009.05.018