2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 11: Recycling & Environmental
| Editors: | Kongoli F, Havlik T, Pagnanelli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 410 pages |
| ISBN: | 978-1-987820-34-8 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Zeolite Synthesized from Finnish Industrial Waste Coal Fly Ash by a Two Step Process
Gaurav Das1; Bob Talling2;1, Espoo, Finland; 2EKOLITE OY, Turku, Finland;
Type of Paper: Regular
Id Paper: 508
Topic: 7
Abstract:
Zeolite was synthesized from Naantali power plant coal flyash (CFA) using two step fusion and thermal process. Effect of fusion temperature, thermal treatment time, washing effects etc were investigated and analysed. The zeolite so formed were characterized by SEM, EDX, XRD. The XRD analysis revealed the type as Zeolite HS with sodalite framework. The unique feature of this framework is that it has smallest pore size and is commonly used in sieving operation to purify wastewater from heavy metals and organic effluents. A corresponding reaction mechanism has also been proposed. The zeolite had very high crystallinity of 85-100%. The best specimen were found at 500°C; fusion and 8 hour thermal treatment along with 16 hours thermal treatment. The reproductive tests carried out revealed identical results which prove the process can be repeated. This is the first time ever that zeolites from coal flyash were made in Finland. This is an initiative towards circular economy where wastes are not thought as wastes but raw materials for other processes and valuable materials and is in clear line with EU Horizon 2020 industrial and innovation objectives.