Influence of Temperature and Alkalescency on the Crystallization of ZSM and ZK Zeolites

• Published in: Theoretical foundations of chemical engineering 2021-05, Vol.55 (3), p.479-489
• Main Author: Mamedova, G. A.
• Format: Article
• Language: English
• Subjects: Chemistry; Chemistry and Materials Science; Crystal structure; Crystallinity; Crystallization; Degree of crystallinity; Industrial Chemistry/Chemical Engineering; Infrared analysis; Infrared spectroscopy; Synthesis; Temperature effects; Zeolites
• ISSN: 0040-5795; 1608-3431
• DOI: 10.1134/S0040579521030131

This work is a successful synthesis of a series of ZSM and ZK zeolites on the basis of the natural zeolite of Nakhchivan without organic agent along with the research of the effect of temperature and alkalescency on the process of their crystallization. The respective natural sample has been obtained from the zeolite horizon in the north-west of the Kyukyuchai River, where zeolite content varies in the range of 75–80%. Zeolite tuffs of Nakhchivan have been used as a source of the sample, 78.5% of which is the major mineral – mordenite, 19.5% is quarts, and 2.00% is anortite. The initial material and the resultant products have been studied using the X-ray diffraction and IR-spectroscopy analysis techniques. The optimum conditions for maximum crystallinity degree of synthesized zeolites ZSM and ZK have been obtained. It has been found that crystallization temperature and alkalescency have different effects on the rate formation of resultant products, their degree of crystallinity, pure phase zeolite. It has been found that the synthesis of zeolites ZSM-5, ZSM-10, ZSM-25, ZK-5 and ZK-4 takes a long time, with the exception of ZK-4, which has been obtained within a few hours. These results can be explained by the Goldschmidt principle.