Synthesis of FAU Type Zeolite Y from Natural Raw Materials: Hydrothermal SiO2-Sinter and Perlite Glass

Abstract

The first synthesis of pure FAU-type zeolite Y from a SiO 2-sinter and perlite glass is presented. FAU-type Zeolite Y was synthesized at 95 ± 2°C after 6-12 hours using gels having SiO 2 :Al 2 O 3 :Na 2 O molar ratios of 8.4:1:4.2 and using gels with SiO 2 :Al 2 O 3 :Na 2 O molar ratios of 10.5:1:4.2 between 48 and 120 hours reaction time. Except for zeolite Y, zeolite NaP c , gmelinite-Na and the OH-analogue of sodalite were produced from starting gels with different composition. The cation exchange capacity of zeolite Y was 3.3 meq.g-1 and its specific surface area was 520-550 m 2 .g-1. Most of the specific surface area is allocated to micropores. Zeolite Y synthesized from gels with a SiO 2 :Al 2 O 3 molar ratio of 10.5:1 has a lattice parameter parameter a o = 24.747 Å and a Si/Al ratio 2:1. It is concluded that inexpensive raw materials such as volcanic glasses can be used for the production of high added value zeolite Y.

Synthesis and characterization of zeolites prepared from industrial fly ash

“…For example, production of Na-X and hydroksysodalite from metakaolinite requires high calcination temperature of kaolinite (650 °C) and further 68 °C for hydrothermal synthesis (Novembre et al 2011 ). A pure zeolite from the faujasite group is obtained from synthesis reaction with perlite (Christidis and Papantoni 2008 ; Pichór et al 2014 ). Another advantage of described zeolites is their content in the final solids where Na-X was 70 wt%, Na-P1—75 wt%, and sodalite 90 wt%, respectively.…”

Hydrothermal synthesis of zeolite Y from green materials

“…A 35% increase in CEC for zeolite Y with SAR 3.5 was observed when compared to zeolite Y with SAR 2.0 in the zeolitization process. [105,106] This phenomenon occurred because of the high specific area and higher SAR of the zeolite Y with SAR 3.5. The CEC values derived for zeolite Y recommend that the materials have a huge potential for ion exchange capacities.…”

Polydiphenylamine/Zeolite Y composites and electrical conductivity responses toward halogenated hydrocarbons

“…The FT-IR spectra of Y_H + show major absorption peaks at 1213, 1080, 836, and 459 cm -1 . These peaks can be assigned to the asymmetric stretch of the internal tetrahedral, the asymmetric stretch of the external linkage, the symmetric stretch of the external linkage, and the T-O bend of the internal tetrahedral, respectively 27,28 . The average particle size of D-PDPA and Y_H + was 125.96 ± 5.51 µm and 20.66 ± 0.58 µm, respectively.…”

“…Figure 5 shows the FT-IR spectra of the vapors. Before exposure to DCM, the absorption peaks at 1594, 1505, 1318, 1213, 1080, 836, and 748 cm -1 can be assigned to the quinoid ring stretching of D-PDPA 25 , the phenyl hydrogen of D-PDPA 15 , the benzenoid ring stretching of D-PDPA, the asymmetric stretch of the internal tetrahedral in Y_H + [80], the asymmetric stretch of the external linkage, the symmetric stretch of external linkage 27,28 , and the 1, 4 substituted on aromatic rings 24 , respectively. During exposure to DCM, new peaks occur at 3097, 1285, and 752 cm -1 which can be assigned to the hydrogen bonding between the oxygen atom of Y_H + and the hydrogen atom , and the interaction of the chlorine atom of DCM and the nitrogen atom of D-PDPA backbone 42 , respectively.…”