Abstract
Continuous production and accumulation of coal ash in coal boilers has become a major economic and environmental concern. Transport of ash offsite for cement and concrete production seems economically unattractive. On-site value addition can be done if coal ashes could be converted to zeolites that possess high environmental applications. The present study was done to evaluate the possibility of converting coal ashes to zeolites. Coal ashes were subjected to chemical treatments to study the effect on material characteristics. X-ray fluorescence spectrophotometry results evidenced extraction of Al with alkaline treatment and extraction of Si with acid treatment proving the possibility of synthesizing zeolite X with alkaline treatment. Alkaline treatment followed by hydrothermal crystallization yielded 62% and 54% of zeolite from fly ash and bottom ash respectively. X-ray diffraction and Fourier transformation-infrared spectroscopy patterns of synthesized zeolites showed characteristics of standard zeolite X, verifying the formation of Zeolite X.
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Acknowledgements
Authors sincerely acknowledge the encouragement and guidance provided by Dr. A. Illangasinghe, course coordinator and all the members of the academic and non-academic staff members of Department of Chemical and Process Engineering, University of Peradeniya, Mr. Manoj Dassanayake, Engineering Manager, Brandix Textiles Ltd., Sri Lanka, Prof. Ranjith Dissanayake, Mr. Selvakumar and Ms. Rashmi Kumarasinghe, Assistant Manager Analytical Services, Sri Lanka Institute of Nanotechnology.
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Herath, H.M.R.S., Kalpage, C.S., Manipura, A. (2022). Utilization of Coal Fly Ash and Bottom Ash as Raw Materials in Synthesis of Zeolites. In: Dissanayake, R., Mendis, P., Weerasekera, K., De Silva, S., Fernando, S. (eds) ICSBE 2020. Lecture Notes in Civil Engineering, vol 174. Springer, Singapore. https://doi.org/10.1007/978-981-16-4412-2_33
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DOI: https://doi.org/10.1007/978-981-16-4412-2_33
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