Supersolubility and induction of aluminosilicate nucleation from clear solution
文献类型：期刊论文
| 作者 | Zhang, YF; Li, YH; Zhang, Y |
| 刊名 | JOURNAL OF CRYSTAL GROWTH
 |
| 出版日期 | 2003-06-01 |
| 卷号 | 254期号:1-2页码:156-163 |
| 关键词 | induction nucleation stability period supersolubility alumina production sodium aluminosilicate |
| ISSN号 | 0022-0248 |
| 其他题名 | J. Cryst. Growth |
| 中文摘要 | The supersolubility of silica in supersaturated aluminate solution and the sodium aluminosilicate precipitation nucleation mechanism from the clear solution were investigated by experiment. The obtained semi-empirical expression of the induction (t(ind)) of sodium aluminosilicate precipitation from clear solution is significant for zeolite A membranes synthesis, desilication and. more important for valuating the stability of the supersaturated SiO2 in the aluminate solution during the. hydrolysis operation in the - most used alkaline alumina manufacture. The semi-empirical expressions of the silica supersolubility in clear supersaturated sodium aluminate solution for both homogeneous and heterogeneous nucleation were originally conducted. The homogeneous nucleation predominated with the supersaturation (S) above 6.0, conversely, heterogeneous nucleation with S below 4.0. The inferred activation energy (Ea) of the homogeneous nucleated reaction was 14.9 kJ/mol, and that of the heterogeneous 50.5 kJ/mol. The interfacial tension (gamma(s)) between the precipitate of sodium aluminosilicate and the surrounding aqueous solution was obtained at 15.1 mJ/m(2), negligibly decreased with increasing temperature. It was much larger than the value of 12.4 mJ/m(2) in pure water (J. Phys. Chem. B 105 (2001) 5383), but very much smaller than the estimated value of 38.64-50mJ/m(2) in the solution for traditional zeolite synthesis. (C) 2003 Elsevier Science B.V. All rights reserved. |
| 英文摘要 | The supersolubility of silica in supersaturated aluminate solution and the sodium aluminosilicate precipitation nucleation mechanism from the clear solution were investigated by experiment. The obtained semi-empirical expression of the induction (t(ind)) of sodium aluminosilicate precipitation from clear solution is significant for zeolite A membranes synthesis, desilication and. more important for valuating the stability of the supersaturated SiO2 in the aluminate solution during the. hydrolysis operation in the - most used alkaline alumina manufacture. The semi-empirical expressions of the silica supersolubility in clear supersaturated sodium aluminate solution for both homogeneous and heterogeneous nucleation were originally conducted. The homogeneous nucleation predominated with the supersaturation (S) above 6.0, conversely, heterogeneous nucleation with S below 4.0. The inferred activation energy (Ea) of the homogeneous nucleated reaction was 14.9 kJ/mol, and that of the heterogeneous 50.5 kJ/mol. The interfacial tension (gamma(s)) between the precipitate of sodium aluminosilicate and the surrounding aqueous solution was obtained at 15.1 mJ/m(2), negligibly decreased with increasing temperature. It was much larger than the value of 12.4 mJ/m(2) in pure water (J. Phys. Chem. B 105 (2001) 5383), but very much smaller than the estimated value of 38.64-50mJ/m(2) in the solution for traditional zeolite synthesis. (C) 2003 Elsevier Science B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Crystallography ; Materials Science, Multidisciplinary ; Physics, Applied |
| 研究领域[WOS] | Crystallography ; Materials Science ; Physics |
| 关键词[WOS] | ZEOLITE-A ; CRYSTALLIZATION KINETICS ; GROWTH |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000183234700023 |
| 公开日期 | 2013-11-08 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/5361]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, YF,Li, YH,Zhang, Y. Supersolubility and induction of aluminosilicate nucleation from clear solution[J]. JOURNAL OF CRYSTAL GROWTH,2003,254(1-2):156-163. |
| APA | Zhang, YF,Li, YH,&Zhang, Y.(2003).Supersolubility and induction of aluminosilicate nucleation from clear solution.JOURNAL OF CRYSTAL GROWTH,254(1-2),156-163. |
| MLA | Zhang, YF,et al."Supersolubility and induction of aluminosilicate nucleation from clear solution".JOURNAL OF CRYSTAL GROWTH 254.1-2(2003):156-163. |
入库方式： OAI收割
来源：过程工程研究所
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