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Isotherm and basic thermodynamic characteristics of ammonia adsorption in CsZSM-5 zeolite.
- Source :
-
AIP Conference Proceedings . 2024, Vol. 3045 Issue 1, p1-7. 7p. - Publication Year :
- 2024
-
Abstract
- This paper presents the results obtained by adsorption-calorimetric method of isotherms and basic (ΔH, ΔF and ΔS) thermodynamic characteristics of ammonia adsorption in Cs3,17ZSM-5 zeolite, also the adsorption isotherm described by the equations of the volume filling theory of micropores (TFSM). For measurements of isotherms and differential heat of adsorption, a system consisting of a universal high-vacuum adsorption unit and a coupled differential modified Tian-Calvet type microcalorimeter, DAK-1-1A, was used which directly quantifies and qualifies the nature and forces of adsorption interaction. The correlation between the adsorption-energy characteristics is found and the molecular mechanism of ammonia adsorption in Cs3,17ZSM-5 zeolite in the whole filling region is revealed. Ammonia adsorbed in the Cs3,17ZSM-5 zeolite is located in the first coordination sphere with the Cs+ cation, forming penta-ammonia complexes. It is determined that the average molar entropy of ammonia adsorption on the Cs3,17ZSM-5 zeolite, indicates that in the zeolite the mobility of ammonia molecules is below the liquid phase and close to the mobility of the solid phase, indicating a strong limitation of mobility of ammonia adsorbed on cations. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0094243X
- Volume :
- 3045
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- AIP Conference Proceedings
- Publication Type :
- Conference
- Accession number :
- 175958040
- Full Text :
- https://doi.org/10.1063/5.0197772