{"title":"沸石A的溶解度是多少?","authors":"J. Šefc̆ík, A.V. McCormick","doi":"10.1016/S0927-6513(97)00007-2","DOIUrl":null,"url":null,"abstract":"<div><p>A meaningful solubility product of a zeolite should remain constant as composition of zeolite mother liquors varies at a given temperature. We identify a solubility product of zeolite A, <em>∏</em><sub>s</sub>=[Si(OH)<sub>4</sub>][Al(OH<sup>−</sup><sub>4</sub>][Na<sup>+</sup>]=1.2×10<sup>−8</sup>M<sup>3</sup>. from experimental data in highly alkaline aqueous solutions under conditions typical for zeolite A synthesis (1 M ≤ [Na] ≤ 4 M, 353 K ≤ <em>T</em> ≤ 363 K). To accomplish this we develop a thermodynamic model of dilute sodium aluminosilicate solutions representing mother liquors in equilibrium with zeolite A. Proper modeling of the liquid phase adjacent to a growing zeolite is necessary to obtain meaningful supersaturation values and solubility products. Further quantitative modeling of solution mediated zeolite growth and dissolution should include a physically relevant model of aluminosilicate speciation in the liquid phase.</p></div>","PeriodicalId":100926,"journal":{"name":"Microporous Materials","volume":"10 4","pages":"Pages 173-179"},"PeriodicalIF":0.0000,"publicationDate":"1997-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0927-6513(97)00007-2","citationCount":"13","resultStr":"{\"title\":\"What is the solubility of zeolite A?\",\"authors\":\"J. Šefc̆ík, A.V. McCormick\",\"doi\":\"10.1016/S0927-6513(97)00007-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>A meaningful solubility product of a zeolite should remain constant as composition of zeolite mother liquors varies at a given temperature. We identify a solubility product of zeolite A, <em>∏</em><sub>s</sub>=[Si(OH)<sub>4</sub>][Al(OH<sup>−</sup><sub>4</sub>][Na<sup>+</sup>]=1.2×10<sup>−8</sup>M<sup>3</sup>. from experimental data in highly alkaline aqueous solutions under conditions typical for zeolite A synthesis (1 M ≤ [Na] ≤ 4 M, 353 K ≤ <em>T</em> ≤ 363 K). To accomplish this we develop a thermodynamic model of dilute sodium aluminosilicate solutions representing mother liquors in equilibrium with zeolite A. Proper modeling of the liquid phase adjacent to a growing zeolite is necessary to obtain meaningful supersaturation values and solubility products. Further quantitative modeling of solution mediated zeolite growth and dissolution should include a physically relevant model of aluminosilicate speciation in the liquid phase.</p></div>\",\"PeriodicalId\":100926,\"journal\":{\"name\":\"Microporous Materials\",\"volume\":\"10 4\",\"pages\":\"Pages 173-179\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1997-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S0927-6513(97)00007-2\",\"citationCount\":\"13\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Microporous Materials\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0927651397000072\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microporous Materials","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0927651397000072","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 13
摘要
当沸石母液的组成在给定温度下变化时，沸石的有意义的溶解度产物应保持不变。我们确定了沸石a的溶解度产物，∏s=[Si(OH)4][Al(OH - 4][Na+]=1.2×10−8M3。根据高碱性水溶液中沸石A合成的典型条件(1 M≤[Na]≤4 M, 353 K≤T≤363 K)的实验数据，我们建立了稀铝硅酸钠溶液的热力学模型，代表母液与沸石A的平衡。为了获得有意义的过饱和值和溶解度产物，必须对沸石生长附近的液相进行适当的建模。溶液介导的沸石生长和溶解的进一步定量模型应该包括液相中铝硅酸盐形态形成的物理相关模型。
A meaningful solubility product of a zeolite should remain constant as composition of zeolite mother liquors varies at a given temperature. We identify a solubility product of zeolite A, ∏s=[Si(OH)4][Al(OH−4][Na+]=1.2×10−8M3. from experimental data in highly alkaline aqueous solutions under conditions typical for zeolite A synthesis (1 M ≤ [Na] ≤ 4 M, 353 K ≤ T ≤ 363 K). To accomplish this we develop a thermodynamic model of dilute sodium aluminosilicate solutions representing mother liquors in equilibrium with zeolite A. Proper modeling of the liquid phase adjacent to a growing zeolite is necessary to obtain meaningful supersaturation values and solubility products. Further quantitative modeling of solution mediated zeolite growth and dissolution should include a physically relevant model of aluminosilicate speciation in the liquid phase.
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