Synthesis of a high-quality NaP zeolite from epidesmine by a hydrothermal method

Abstract

Epidesmine as a silicon source was used to synthesize NaP zeolite by a hydrothermal method. Parameters such as SiO 2/Al 2O 3 and H 2O /Na 2O molar ratios, reaction temperatures and reaction times were investigated for regulating the purity of the final product. The samples were characterized by X-ray diffraction, infrared spectroscopy and scanning electron microscope. The experimental results evidenced that a high-quality NaP zeolite was obtained at SiO 2/Al 2O 3 and H 2O /Na 2O molar ratios of 3.7 and 55, respectively, and at a temperature of 95 ∘C for 6.5 h of ageing. The BET surface area and total pore volume of the powders were 17.1359m2g-1 and 0.006845cm3g-1, and the pore size was ∼3.2μm.