Abstract
Silicalite-1 is pure polymorph silica that is considered a member of zeolite family due to the similarity of its framework to the well-known ZSM-5. It is an organophilic and hydrophobic material with molecular sieving property that allows it to be widely used as an adsorbent. In this work, silicalite-1 is synthesized by conventional hydrothermal treatments at atmospheric (T = 80 °C) and high pressures (T = 150 °C), respectively. In addition, the procedure is repeated using ultrasound waves during the mixing and ageing steps to shorten the synthesis time. The high crystallinity and phase purity of high-temperature autoclaved and sonicated samples are confirmed by X-ray powder diffraction and scanning electron microscopy results. Moreover, adsorption equilibrium of CH4 and CO2 has been studied experimentally to investigate the influence of textural properties of the obtained products on their adsorption performance. The experiments were performed in a batch system on the basis of a volumetric measurement te...
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