Thermodynamics of Carbon (IV)-Oxide adsorption on NaA Zeolite obtained by modification of angren kaolin
Muxlis OydinovInstitute of General and Inorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan, avenue Mirzo Ulugbek, 77A, 100071 Tashkent, UzbekistanTolibjon AbdulxayevNamangan Engineering and Technological Institute, 160115 Namangan, UzbekistanMirzihid KokhkharovNamangan Engineering and Technological Institute, 160115 Namangan, UzbekistanEldor AbdurakhmonovInstitute of General and Inorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan, avenue Mirzo Ulugbek, 77A, 100071 Tashkent, UzbekistanFiruza RakhmatkarievaInstitute of General and Inorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan, avenue Mirzo Ulugbek, 77A, 100071 Tashkent, Uzbekistan
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Purification of natural gas from carbon dioxide is extremely important for the gas processing industry of Uzbekistan. Type A zeolites are the most suitable for this purpose. The patterns of water adsorption in the NaA zeolite have been considered. It was found that an appreciable amount of water is adsorbed in β-cavities. The carbon dioxide molecule is somewhat larger than the water molecule and, therefore, at room temperature it is unable to penetrate into the β-cavities through the six-membered oxygen windows of 2.6 Å diameter and form there ion-molecule clusters with sodium cations. However, the cations themselves can migrate from the β-cavities to the α-cavities under the influence of adsorbing molecules.
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