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Supersolubility and induction of aluminosilicate nucleation from clear solution
Alternative TitleJ. Cryst. Growth
Zhang, YF; Li, YH; Zhang, Y
2003-06-01
Source PublicationJOURNAL OF CRYSTAL GROWTH
ISSN0022-0248
Volume254Issue:1-2Pages:156-163
AbstractThe 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.; 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.
KeywordInduction Nucleation Stability Period Supersolubility Alumina Production Sodium Aluminosilicate
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/S0022-0248(03)01112-6
URL查看原文
Indexed BySCI
Language英语
WOS KeywordZEOLITE-A ; CRYSTALLIZATION KINETICS ; GROWTH
WOS Research AreaCrystallography ; Materials Science ; Physics
WOS SubjectCrystallography ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000183234700023
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/5361
Collection研究所(批量导入)
AffiliationChinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China
Recommended Citation
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.
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