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Vol.2 , No. 3, Publication Date: Jul. 19, 2016, Page: 20-24
 and anion exchange capacity (AEC) capacities derived were 26.9 and 28.4 respectively with the produced zeolites being thermally stable at 250°C. Regeneration of the spent zeolite was achieved by treating with 1.05N HCl. Summing up the results, we can show that zeolite formation with dual ion exchange sites is possible by hydrothermal reaction. Besides the importance for separation chemistry, the reaction via this method is of interest for zeolite chemistry as the re-use of the spent zeolite is possible under economically conditions of low energy consumption and short reaction periods.&picture=http://www.aascit.org/aascit/decorators/img/journal/891.jpg)
| [1] | John Mugisa, Faculty of Engineering, International University of East Africa, Kampala, Uganda. |
| [2] | G. W. Nyakairu, Department of Chemistry, Makerere University, Kampala, Uganda. |
| [3] | Farad Sagala, Department of Petroleum Engineering, Universiti Teknologi, Johor Bahru, Malaysia. |
Zeolites are aluminosilicate solids bearing a negatively charged honeycomb framework of micro pores into which molecules may be adsorbed for separation purposes as well as catalysis of chemical reactions. In this study, Na-Zeolite was synthesized via a hydrothermal reaction on the basis of dual cation/anion exchange capacities with regeneration capabilities. The sodium silicate solution used in the laboratory experiments was in the concentration range of 62-65%. Both anionic and cationic functional groups together are derived from the concentrated sodium silicate solution where during depolymerization of siloxane bonds takes place not only into silanol anions but also silanol cations. The silanol cations and anions polymerize into cyclic anionic and cationic functional groups respectively showing dual cation and anion exchange property. X-ray diffraction pattern indicates a crystalline structure with the material present in one phase. Cation exchange capacity (CEC) and anion exchange capacity (AEC) capacities derived were 26.9 and 28.4 respectively with the produced zeolites being thermally stable at 250°C. Regeneration of the spent zeolite was achieved by treating with 1.05N HCl. Summing up the results, we can show that zeolite formation with dual ion exchange sites is possible by hydrothermal reaction. Besides the importance for separation chemistry, the reaction via this method is of interest for zeolite chemistry as the re-use of the spent zeolite is possible under economically conditions of low energy consumption and short reaction periods.
Keywords
Na-zeolites, Dual Exchange Capacity, Hydrothermal, Regeneration
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