PSI - Issue 67

I. Flores-Vivián et al. / Procedia Structural Integrity 67 (2025) 80–89 Ismael Flores-Vivián/ Structural Integrity Procedia 00 (2024) 000 – 000

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Figure 3. Natural zeolite X-ray diffractogram The chemical composition of the ZN was obtained by XRF. Table 2 shows the percentages of the components expressed as oxides. Its main components are SiO 2 , Al 2 O 3 , and Na 2 O. The material was ground for 120 minutes in a ball mill to reduce its particle size. After grinding, a d 50 = 30.4 μ m and rounded particles were obtained as shown in Figure 4.

Table 2 . Chemical Composition of Natural Clinoptilolite-Type Zeolite. Oxides SiO 2 Al 2 O 3 Na 2 O CaO MgO K 2 O Others % 86.65 6.23 2.94 1.46 0.21 1.59 0.92

Figure 4. Microscopy of natural zeolite after undergoing grinding.

2.3. Synthesis of NaY nanozeolite The synthesis of nanozeolite was carried out by the sol-gel process, using the seeding method, which involves three main steps: Seeding gel, Feedstock gel y Over all gel (Ahmedzeki, Yilmaz, & Al-Tabbakh, 2016) , (IZA , 2016) . The materials used as precursors were NaAlO 2 , Na 2 SiO 3 , and NaOH. H 2 O was used as a solvent. Table 3 shows the molar ratio of Si/Al, the type of material and the general composition to produce this material.