What is the solubility of zeolite A?

J. Šefčík, A. V. McCormick

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

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, Πs = [Si(OH)4][Al(OH4-][Na+] = 1.2 × 10-8 M3, 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.

Original languageEnglish (US)
Pages (from-to)173-179
Number of pages7
JournalMicroporous Materials
Volume10
Issue number4-6
DOIs
StatePublished - Jan 1 1997

Keywords

  • Aqueous aluminosilicate solution
  • Solubility product
  • Supersaturation
  • Thermodynamic equilibrium model
  • Zeolite A

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