| 석탄회의 황산화반응과 알루미늄이온의 마이크로파 추출 |
| 박영증, 박영민, 양태영, 윤석영, 박홍채 |
| 부산대학교 재료공학부 |
| Sulfating Reaction of Coal Fly Ash and Microwave Extraction of Aluminum Ions |
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| ABSTRACT |
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The sulfating reaction of coal fly ash with ammonium sulfate and the microwave extraction of aluminum ions from the resultant materials using sulfuric acid have been investigated. The (NH$_4$)$_3$Al(SO$_4$)$_3$ formed by the reaction of coal fly ash and ammonium sulfate decomposed to NH$_4$Al(SO$_4$)$_2$ at $geq$ 350$^{circ}C$. The maximum efficiency of aluminum ions extracted from the sulfating reaction product (400$^{circ}C$, 120 min) by microwave heating (90$^{circ}C$, 240 min) using 1 M H$_2$SO$_4$ was 84％ (based on Al content in coal fly ash) but 77％ by conventional heating at same condition. |
| Key words:
Coal fly ash, Sulfating reaction, Ammonium sulfate, Sulfuric acid, Microwave extraction, Aluminum ions |
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