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Conventional and microwave hydrothermal synthesis of zeolite ZSM-5 from the cupola slag |
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| Authors: | Rewadee Anuwattana Kenneth J Balkus Jr Suwimol Asavapisit Pojanie Khummongkol |
| Affiliation: | aEnvironmental Technology Division, School of Energy and Materials, King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand bDepartment of Chemistry, The University of Texas at Dallas, P.O. Box 830688, Richardson, TX 75083-0688, USA |
| Abstract: | ZSM-5 type zeolites have been prepared from cupola slag waste using both conventional hydrothermal and microwave syntheses at 130–200 °C. The ZSM-5 was synthesized by conventional heating by taking advantage of the high silica content of cupola slags. Microwave heating increased the rate of ZSM-5 formation by 4 times at 150 °C compared with conventional heating. The Si/Al ratio of the ZSM-5 produced by the conventional heating and the microwave crystallization were similar 28 and 29, respectively. The conventional-heating produced ZSM-5 particles 3 μm in diameter, while, microwave-heating produced smaller ZSM-5 particles only 0.3 μm in size. |
| Keywords: | Zeolite ZSM-5 synthesis Waste materials Cupola slag Microwave heating |
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