Recrystallization of Zeolite Y to Analcime and Zeolite P with <SC>d</SC>‐Methionine as Structure‐Directing Agent (SDA)

Abstract

In this study, the synthesis of template free zeolite Y and its recrystallization to two types of pure zeolite P and analcime in the presence of the amino acid d‐methionine as structure‐directing agent were investigated. The recrystallization occurred solely when specific heating cycles were applyed. A completely crystallized phase of zeolite Y for the mixture of zeolite P and analcime was observed in the presence of d‐methionine at a concentration of 0.015 <SC>m</SC>. The effect of different Si/Al ratios (2.3–9.3), crystallization temperatures (40–160 °C), and crystallization times (28–96 hours) on the achievement of two different zeolite types were studied as well. Pure zeolite P was obtained during conventional heating to 100 °C for 42 hours, whereas pure analcime zeolite was achieved by heating the mixture to 160 °C for 96 hours. The products were characterized by X‐ray diffraction, scanning electron microscopy, and IR spectroscopy.

Methionine templated analcime for enhancing heavy metal adsorption

“…Methionine template analcime and template-free analcime were obtained according to the reported procedure 16 . The reagents D-methionine, silicic acid, NaOH, and aluminium powder (all purchased from Merck) were used in the synthesis.…”

“…In a separate experiment, it also protects the animals from the toxic effects of mercury and atrazine (a herbicide) 15 . In our previous work, the effect of D-methionine on the transformation of the structure of zeolite Y to analcime and zeolite P was investigated and these two zeolites were synthesized in the presence of D-methionine as a template 16 . In this study, the removal of Cu(II) and Ni(II) cations was studied to www.scienceasia.org evaluate the effect of methionine amino acid on the adsorption ability of methionine template analcime with respect to template-free analcime.…”

Alkali-activation of spent fluid cracking catalysts for CO 2 capture

“…Apparently, these phase transformations are less thermodynamically spontaneous than the FAU/CHA one. Besides, the formation of ANA as a more stable phase from GIS was extensively reported [35,36]. The presence of GIS and ANA structures in the prepared materials after hydrothermal treatment were confirmed by the FTIR bands in 720 and 610 cm À1 assigned to 4-membered and 6-membered rings vibrations in S4R group, respectively [28].…”

“…Furthermore, the formation of zeolites P1 and analcime from a zeolite Y precursor (corresponding to FAU/GIS and FAU/ANA phase transformations) were reached by Azizi and coworkers [36] using D-methionine as SDA. Apparently, these phase transformations are less thermodynamically spontaneous than the FAU/CHA one.…”

Cu-modified analcime as a catalyst for oxidation of benzyl alcohol: Experimental and theoretical

“…For enhancing the catalytic properties of analcime, the methionine templated analcime zeolite synthesized in our previous work [12] was modified by copper nitrate solution and then used as a catalyst in liquid phase oxidation of BzOH with H 2 O 2 . Furthermore, the effects of parameters, including the amounts of catalyst and types of solvent have been investigated in detail.…”