Thermodynamics of nitrogen and oxygen sorption on zeolites LiLSX and CaA

Sorption thermodynamics of nitrogen, N 2, and oxygen, O 2, on zeolites LiLSX and CaA were investigated using an isosteric sorption technique [Stud. Surf. Sci. Catal. 83 (1994) 209; Micropor. Mesopor. Mater. 22 (1998) 237] and molecular simulation. The sorption thermodynamic quantities, i.e., isoster...

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Bibliographic Details
Published in:Microporous and mesoporous materials 2001-11, Vol.48 (1), p.211-217
Main Authors: Shen, Dongmin, Bülow, Martin, Jale, Sudhakar R, Fitch, Frank R, Ojo, Adeola F
Format: Article
Language:English
Subjects:
CaA
Chemistry
Exact sciences and technology
General and physical chemistry
LiLSX
Nitrogen
Oxygen
Solid-gas interface
Sorption thermodynamics
Surface physical chemistry
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Summary:Sorption thermodynamics of nitrogen, N 2, and oxygen, O 2, on zeolites LiLSX and CaA were investigated using an isosteric sorption technique [Stud. Surf. Sci. Catal. 83 (1994) 209; Micropor. Mesopor. Mater. 22 (1998) 237] and molecular simulation. The sorption thermodynamic quantities, i.e., isosteric sorption heat, standard sorption entropy and standard Gibbs free sorption energy, were obtained over entire sorption phase concentration ranges from nearly zero to micropore saturation concentration. The differences in these thermodynamic quantities for the two zeolites of different structures and cation compositions were discussed, and these experimental data were compared with the results from molecular simulation. The advantages of LiLSX over CaA as sorbents for air separation were quantified.
ISSN:1387-1811
1873-3093
DOI:10.1016/S1387-1811(01)00355-9