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研究了变压吸附空气分离制氧吸附剂———锂交换低硅铝比八面沸石LiLSX中残留水及从外部引入的水对吸附性能的影响.研究表明,在水合LiLSX经脱附后,当残留的水分子数目为0～32(个分子/晶胞)时,N2或O2的吸附量下降显著.原因是N2和O2的吸附主要依赖于处在SIII位置的32个锂离子.当水分子与SIII位置的Li+结合时,就会阻碍N2或O2的吸附.而从外部引入的水分子与脱附残留的水分子相比,在相同水含量时对吸附量的影响较小,这是由于吸附位置的不均匀性以及水分子在沸石中的扩散行为所引起.在水扩散进入LiLSX内部的过程中,一部分水分子可以吸附在能量较低的位置上而不是吸附到最强的SIII位置上.
The effect of pressure swing adsorption air separation oxygen adsorbent --- lithium exchanged low silica alumina ratio faujasite LiLSX residual water and water introduced from the outside on the adsorption performance was studied.The results show that after the hydrated LiLSX is desorbed, The adsorption amount of N2 or O2 decreases significantly when the residual number of water molecules is 0 to 32 (molecules / unit cell), because the adsorption of N2 and O2 mainly depends on 32 lithium ions at the SIII position The binding of molecules to Li + at SIII hinders the adsorption of N2 or O2, whereas the water molecules introduced from the outside have less influence on the adsorption capacity at the same water content than the water molecules with desorption Due to inhomogeneous adsorption sites and the diffusion behavior of water molecules in zeolites.As water diffuses into the interior of LiLSX, some of the water molecules can be adsorbed at lower energies rather than at the strongest SIII sites on.