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    Effect of variations in parameters on the crystallization of mordenite zeolite

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    International audienceIntroduction/purpose: This study highlights the importance of synthesis parameters in the crystallization of mordenite zeolite. Precise control of the SiO₂/Al₂O₃ ratio, alkalinity and crystallization time results in mordenite crystals with high crystallinity and optimum purity, while avoiding the formation of secondary or amorphous phases. Methods: The materials were prepared by the hydrothermal method, using silica gel and sodium aluminate as sources of silicon and aluminum, respectively. Several synthesis parameters were varied, including SiO₂/Al₂O₃ molar ratio, alkalinity (OH-/Si), as well as crystallization time, in order to assess their effect on mordenite crystal formation. Experiments were carried out at a constant temperature of 170°C and 190°C. Results: The results show that the SiO₂/Al₂O₃ ratio plays a crucial role in crystal formation. A low ratio, such as 15, combined with high alkalinity, favors the formation of analcime crystals. On the other hand, a high ratio, such as 30, leads to the formation of mordenite crystals with high crystallinity and purity. However, when this ratio reaches 60 and is combined with low alkalinity, crystalline nucleation is impeded, leading to the formation of an amorphous material. Concerning alkalinity (OH-/Si), the values of 0.39 and 0.49 result in pure, well-crystallized mordenite crystals, while higher values, such as 0.59, lead to the formation of secondary phases. With regard to crystallization time, the periods of 48 and 72 hours at 170°C produced pure, well-crystallized mordenite crystals. Conclusion: This study highlights the importance of synthesis parameters in the crystallization of mordenite zeolite. Precise control of the SiO₂/Al₂O₃ ratio, alkalinity and crystallization time results in mordenite crystals with high crystallinity and optimum purity, while avoiding the formation of secondary or amorphous phases

    Abstracts of 1st International Conference on Computational & Applied Physics

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    This book contains the abstracts of the papers presented at the International Conference on Computational & Applied Physics (ICCAP’2021) Organized by the Surfaces, Interfaces and Thin Films Laboratory (LASICOM), Department of Physics, Faculty of Science, University Saad Dahleb Blida 1, Algeria, held on 26–28 September 2021. The Conference had a variety of Plenary Lectures, Oral sessions, and E-Poster Presentations. Conference Title: 1st International Conference on Computational & Applied PhysicsConference Acronym: ICCAP’2021Conference Date: 26–28 September 2021Conference Location: Online (Virtual Conference)Conference Organizer: Surfaces, Interfaces, and Thin Films Laboratory (LASICOM), Department of Physics, Faculty of Science, University Saad Dahleb Blida 1, Algeria
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