| Sustainable fluoride removal with scrap aluminum: Co-producing cryolite and hydrogen | |
|---|---|
| 學年 | 113 |
| 學期 | 1 |
| 出版（發表）日期 | 2024-10-15 |
| 作品名稱 | Sustainable fluoride removal with scrap aluminum: Co-producing cryolite and hydrogen |
| 作品名稱（其他語言） | |
| 著者 | Titima Wongphoom; Vinh Ya; Li, Chi-wang |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Journal of Environmental Chemical Engineering 12(6), 114466 |
| 摘要 | This study presents a novel continuous process for fluoride removal and re- source recovery as cryolite, using a scrap aluminum-packed column. Efficient aluminum dissolution in hydrofluoric acid (HF) generates hydrogen gas and provides cost-saving alkalinity. The process achieves high efficiency (Al/F molar ratio of 2/6) within short Empty Bed Contact Times (15 min) and at low HF concentrations (500 mg/L). Solution pH plays a crucial role, with Al/F ratios above 1 achievable at pH below 4. The exothermic reaction requires temperature control, with a strong correlation (R²=0.99) between HF concentration and heat generation. Hydrogen production matches theoretical predictions. Cryolite synthesis was confirmed at optimized pH (5–5.5) with a 1:1 bypass ratio, achieving 98 % fluoride removal. XRD and SEM- EDS analyses verified cryolite formation. This approach offers a promising solution for industrial fluoride management, resource recovery, and clean hydrogen production. |
| 關鍵字 | |
| 語言 | en_US |
| ISSN | 2213-3437 |
| 期刊性質 | 國外 |
| 收錄於 | SCI EI |
| 產學合作 | |
| 通訊作者 | Chi-Wang Li |
| 審稿制度 | 是 |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | ,電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/126418 ) |
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