Sorption and 13C NMR experiments
Article Abstract:
The sorption properties of linear alkanes in zeolite ferrierite were investigated using heat of adsorption, 13C nuclear magnetic resonance (NMR), adsorption isotherm and temperature-programmed desorption measurements. 13C NMR measurements showed that only short alkanes can access the entire two-dimensional pore structure of ferrierite and that only long alkanes adsorbed only in the 10-ring channels. Temperature-programmed desorption measurements showed that propane and n-butane have easy access to the complete pore structure.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
Adsorption of linear alkanes in the alpha-cages and gamma-cages of H-ZK-5 and K-ZK-5
Article Abstract:
13C NMR spectroscopy and molecular simulations were used in studying the adsorption of linear alkanes in the alpha- and gamma-cages of H-ZK-5 and K-ZK-5 zeolites. Results indicated that alkane molecules up to n-heptane could adsorb in both cages of the two zeolites. However, the adsorption of longer alkane molecules is limited to the alpha-cages only because the gamma-cages have smaller sizes. Propane and n-butane prefer to adsorb in the gamma-cages because of its better heat of adsorption.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
Calorimetric study of adsorption of alkanes in high-silica zeolites
Article Abstract:
A study was conducted to analyze the adsorption of alkanes in high-silica zeolites by calorimetry. Powder samples were pressed into thin wafers to prevent the accumulation of dust. Zeolites were then heated under vacuum from room temperature to 110 degrees C. Results indicated that the zero-coverage heats of adsorption were inversely proportional to the pore diameter and correlated with a smoothed integration for short-range van der Waals interactions.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Deprotonation of water in the presence of carboxylate and magnesium ions. Theoretical studies of solid-liquid interfaces: molecular interactions at the MgO(001)-water interface
- Abstracts: Comparison with other support media. The effect of chemical blocking on the performance of the system. The influence of the nanofiber structure
- Abstracts: Infrared reflection-absorption spectroscopic study on the adsorption structures of 1,3-butadiene at Au(111) and Ag(111) surfaces
- Abstracts: Adsorption in the liquid phase. Platinum aluminophosphate oxynitride (Pt-AIPON) catalysts. Consequences of surface hydrolysis and heating processes on the structure