| 摘要 |
The invention is based upon the recognition that intrinsic sorption rates of adsorbent materials have a significant impact upon process performance. In a preferred embodiment an adsorption process uses an adsorbent zone comprising an adsorbent selected from the group consisting of: A-zeolite, Y-zeolite, NaX, mixed cation X-zeolite, LiX having a Sio2/A12O3 silica/alumina ratio of less than 3.0, chabazite, mordenite, clinoptilolite, silica-alumina, alumina, silica, titanium silicates and mixtures thereof, wherein said adsorbent has a mass transfer coefficient for nitrogen of kN2 12 s-1 and an intrinsic diffusivity for N2, when measured at 1.5 bar and 300K, of Dp 3.5 x 10-6 m2/s. Other embodiments include the development of process parameters around which such materials should be used and methods of making such materials.
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