PMID: 11606244Oct 19, 2001Paper

Highly crystalline Zeolite-A from flyash of bituminous and lignite coal combustion

Journal of Hazardous Materials
S S RayaluM Z Hasan

Abstract

Flyash is being generated in voluminous amounts by large scale coal combustion process. It poses a serious threat to thermal power industries specifically, in India, wherein the percent of utilisation of flyash is very poor (3-5%). In view of this problem, newer methods of its disposal and utilisation are being explored. The synthesis of zeolite from flyash appears to be one of the most promising alternatives as it has emphasis on value addition to waste material. Flyashes originating from different sources of coal differ in their characteristics and have implications in this work on Zeolite-A production. These factors have been thoroughly investigated and the conditions favourable for formation of Zeolite-A have been delineated. The reactivity of flyash towards zeolite formation is directly dependent on the SiO(2)/Al(2)O(3) ratio, Fe(2)O(3) and CaO content. Amongst the flyashes investigated, so far the sub-bituminous coal based flyash with SiO(2)/Al(2)O(3) ratio of 3.47 appears to be a suitable substrate for Zeolite-A synthesis. These zeolites have been characterised with respect to XRD crystallinity, calcium binding capacity (CBC) and sorption capacity, wherein the crystallinity ranges from 50 to 100%, the CBC ranges from 290...Continue Reading

References

Jul 1, 1995·Environmental Science & Technology·A Singer, V Berkgaut

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Citations

Apr 24, 2012·Environmental Technology·Bably PrasadRobert J G Mortimer
Aug 13, 2010·Waste Management·Amr S MeawadYoncho G Pelovski
May 1, 2009·Journal of Environmental Sciences (China)·Chunfeng WangXiuyun Sun
Jan 2, 2008·Journal of Hazardous Materials·Chun-Feng WangXiu-Yun Sun
Mar 28, 2006·Journal of Hazardous Materials·T Mishra, S K Tiwari
Dec 20, 2011·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Nicholas M MusyokaEric Hums
Feb 11, 2012·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Nicholas M MusyokaEric Hums
Apr 4, 2021·International Journal of Environmental Research and Public Health·Tabassum HussainMohammed Nasser Alyemeni

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