Synthesis of Na-A and faujasitic zeolites from high silicon fly ash
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Azadi Avenue, P.O. Box 11365-9465, Tehran (Iran, Islamic Republic of)
- R and D Lab. Of SPAG Co., Technology incubator, Sci. and Technol. Park of Tehran University, Tehran (Iran, Islamic Republic of)
High silicon fly ash (HSFA) utilized as a source of silicon in synthesizing of Na-A, -X and -Y zeolites through alkali fusion followed by hydrothermal treatment at 100 deg. C for 12 h. Various types of zeolites with different degrees of purity were prepared by changing Si/Al ratio of the reaction mixture from 1.6 to 3.0. In addition, exact boundaries of this ratio for synthesis of each zeolite type were determined. Furthermore, the effect of NaOH amount utilized in alkaline fusion step on crystalinity of samples investigated. The synthesized zeolites were characterized using various techniques including; XRD, TGA, FTIR, SEM and BET. The ion-exchange behaviors of zeolitic samples tested with Co{sup 2+}. The obtained Na-X zeolite was crystaline, had a very high cation-exchange capability of 4.9 mequiv. g{sup -1} and possessed relatively high specific surface area of about 434 m{sup 2} g{sup -1}.
- OSTI ID:
- 21199744
- Journal Information:
- Materials Research Bulletin, Vol. 44, Issue 4; Other Information: DOI: 10.1016/j.materresbull.2008.08.008; PII: S0025-5408(08)00280-8; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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