Abstract
Abstract Analcime is a highly crystalline material that is found in nature or can be produced artificially. In this work the hydrothermal synthesis of analcime zeolite without organic template was carried out by evaluating the influence of SiO2/Al2O3, NaOH/SiO2 and H2SO4/SiO2 ratios. The samples were characterized with SBET, XRD and SEM. The results show that there is a wide range of synthesis parameters for obtaining analcime zeolite without template. The most important parameter for material formation and characteristics was the H2SO4/SiO2 ratio. The variation of SiO2/Al2O3 ratio influences the crystallinity of the formed material and, mainly, the synthesis yield. The minimum SiO2/Al2O3 ratio for analcime formation was 10.
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