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https://dspace.ffh.bg.ac.rs/handle/123456789/1632| Title: | Kinetic analysis of experimental intensity curves obtained during zeolite a synthesis using in situ <sup>27</sup>Al NMR spectroscopy | Authors: | Miladinović, Z. Zakrzewska, J. Dondur, Vera |
Issue Date: | 1-Sep-2009 | Journal: | Russian Journal of Physical Chemistry A | Abstract: | Intensity curves obtained by in situ 27Al NMR spectroscopy during zeolite A synthesis have been used as a method for comparative kinetic investigation of zeolite crystallization. Based on inflection point analysis of intensity curves, the times of t sed for process of sedimentation, t start for initiation, and t finish for completion of process in liquid phase connected to crystallization were evaluated. Obtained values for t start and t finish indicated that the rate of processes in liquid phase, connected with gel dissolution and growth of zeolite crystal, decreases with the increase of SiO2/Al2O 3 molar ratio for the same Na2O concentration. On the other hand, increase of Na2O concentration for any of specified SiO2/Al2O3 molar ratio increases the rate of the same processes. © 2009 Pleiades Publishing, Ltd. |
URI: | https://dspace.ffh.bg.ac.rs/handle/123456789/1632 | ISSN: | 0036-0244 | DOI: | 10.1134/S0036024409090118 |
| Appears in Collections: | Journal Article |
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