Removal of sodium (Na2O) from alumina extracted coal fly ash by a mild hydrothermal process
文献类型：期刊论文
| 作者 | Li, Huiquan1; Hui, Junbo1,2; Wang, Chenye1; Bao, Weijun1; Sun, Zhenhua1 |
| 刊名 | HYDROMETALLURGY
 |
| 出版日期 | 2015-03-01 |
| 卷号 | 153页码:1-5 |
| 关键词 | Coal fly ash NaCaHSiO4 Sodium removal Hydrothermal process |
| ISSN号 | 0304-386X |
| 英文摘要 | Sodium was removed from alumina-extracted coal fly ash (CFA) by using diluted NaOH solution. The effects of reaction temperature, reaction time, and NaOH concentration on sodium removal were studied. Result shows that the sodium (Na2O) content of the alumina-extracted CFA was decreased from 20 wt.% to 0.6 wt.% under optimal conditions: temperature of 185 degrees C, NaOH concentration of 50 g/L, residence time of 2 h, and liquid-to-solid ratio of 40 for water washing. The possible mechanism of sodium removal was also investigated using Fourier transform infrared spectroscopy, X-ray diffraction analysis, and nuclear magnetic resonance spectroscopy. The results indicated that NaCaHSiO4 in the residue was decomposed by NaOH to form NaSiO3 and Ca(OH)(2), and then converted into tobermorite [Ca5Si6O16(OH)(2)center dot nH(2)O] and NaOH. The sodium obtained through the reaction in the residue was mainly combined with the silanol group and then washed with water. (C) 2015 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Metallurgy & Metallurgical Engineering |
| 研究领域[WOS] | Metallurgy & Metallurgical Engineering |
| 关键词[WOS] | C-S-H ; ALKALI |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000353003600001 |
| 公开日期 | 2015-07-08 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/16736]  |
| 专题 | 过程工程研究所_湿法冶金清洁生产技术国家工程实验室 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Green Proc & Engn, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Huiquan,Hui, Junbo,Wang, Chenye,et al. Removal of sodium (Na2O) from alumina extracted coal fly ash by a mild hydrothermal process[J]. HYDROMETALLURGY,2015,153:1-5. |
| APA | Li, Huiquan,Hui, Junbo,Wang, Chenye,Bao, Weijun,&Sun, Zhenhua.(2015).Removal of sodium (Na2O) from alumina extracted coal fly ash by a mild hydrothermal process.HYDROMETALLURGY,153,1-5. |
| MLA | Li, Huiquan,et al."Removal of sodium (Na2O) from alumina extracted coal fly ash by a mild hydrothermal process".HYDROMETALLURGY 153(2015):1-5. |
入库方式： OAI收割
来源：过程工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。