ANALYSIS OF THE SYNTHESIS PROCESS FOR LTA-TYPE ZEOLITE WITH ENHANCED SORPTIVE PROPERTIES DERIVED FROM METAKAOLIN
Authors
Pardayev Otabek Tokhtamishovich, Abdurakhmonov Eldor Baratovich
Share
Annotation
The synthesis of the materials in question is performed using two principal techniques. The first technique entails the production of granules composed of 65-85% mayonnaise, with an active zeolite base constituting 25-32% by weight, along with a binder material (natural clay for adsorbents and y-Al2O3 for catalysts). This method is primarily employed for obtaining the predominant portion of donor zeolites. The second technique involves the synthesis of donor zeolites without the use of binders. In this scenario, the granules are formed exclusively through the mutual growth of zeolite crystals, which leads to superior values in terms of adsorption capacity, concentration of catalytic active centers, and mechanical strength when compared to zeolite materials containing binders.
Keywords
Authors
Pardayev Otabek Tokhtamishovich, Abdurakhmonov Eldor Baratovich
Share
References:
1. Keltsev N.V. Fundamentals of adsorption technology./N.V. Keltsev - Moscow: Chemistry, 1984. - 592 p.
2. Pavlov M.L. Study of the crystallization region of NaA zeolite in the form of polycrystalline intergrowths/ M.L. Pavlov, Ya.V. Mirsky, V.V. Pirozhkov // ZhPH. - 1984.-№8. - P. 1857-1859. 115
3. Mirsky Ya.V. Kinetics of crystallization of aluminosilicate granules into polycrystalline intergrowths of type A zeolite/ Ya.V. Mirsky, V.V. Pirozhkov, M.L. Pavlov// Kinetics and catalysis.- 1984.-Vol.25 .-Issue. 1. - P. 22-25.
4. K.E. Hamilton The effects of the silica source on the crystallization of zeolite NaX/ K.E. Hamilton, E.N. Coker, A.G. Dixon, R.W. Thomson // Zeolites - 1993 vol. 13-pp. 645-653
5. S. Chandrasekhar Microwave assisted synthesis of zeolite A from metakaolin/ S. Chandrasekhar, P. N. Pramada// Microporous and Mesoporous Materials -2008 vol. 108-pp. 152-161.
6. C. M. a. A. M. F.E. Imbert Venezuelan natural aluminosilicates as a feedstock in the synthesis of zeolite A // Zeolites- 1994 - vol. 14 - pp. 374-378.
7. M. T. B.-V. M.L. Granizo, A. Palomo Influence of the starting kaolin on alkali activated materials based on metakaolin. Study of the reaction parameters by isothermal conduction calorimetry// Journal of Materials Science -2000 - vol. 35 pp. 6309-6315.
8. R. M. H. T.W. Davies Structural changes i Kaolinite caused by rapid dehy droxylation // Journal of Material science Letters - 1985 - vol. 4 - pp. 39-42.
9. H. A. R.H. Mienhold Calcination of Kaolinite Studied by DSC, TG and MAS NMR/ H. A. R.H. Mienhold, T. W. DAvies and R.C. T. Slade Flash// Journal of Thermal Analysis - 1992 - vol. 38 - pp. 2053-2065.
10. S. Chandrasekhar Influence of metakaolinization temperature on the forma tion of zeolite 4A from kaolin// Clay Minerals - 1996 - vol. 31 - pp. 253-261.
11. A. S. Kovo Development of Zeolite X and Y from Ahoko Nigerian Kaolin // Chemical Engineering: First Year Ph.D Report Manchester The University of Man chester - 2008 - pp. 119.
Other articles of the issue
