Quantification of ammonia binding sites in Davison (Type 3A) zeolite desiccant : a solid-state Nitrogen-15 MAS NMR spectroscopy investigation. | Zendy

Todd M. Alam | Zendy; Gregory P. Holland | Zendy; Brian R. Cherry | Zendy

Open Access

Quantification of ammonia binding sites in Davison (Type 3A) zeolite desiccant : a solid-state Nitrogen-15 MAS NMR spectroscopy investigation.

Author(s) -

Todd M. Alam,

Gregory P. Holland,

Brian R. Cherry

Publication year - 2004

Language(s) - English

Resource type - Reports

DOI - 10.2172/918356

Subject(s) - zeolite , adsorption , chemistry , ammonia , nuclear magnetic resonance spectroscopy , solid state nuclear magnetic resonance , spectroscopy , desiccant , nitrogen , analytical chemistry (journal) , inorganic chemistry , nuclear magnetic resonance , chromatography , organic chemistry , catalysis , physics , quantum mechanics

The quantitative analysis of ammonia binding sites in the Davison (Type 3A) zeolite desiccant using solid-state {sup 15}N MAS NMR spectroscopy is reported. By utilizing 15N enriched ammonia ({sup 15}NH{sub 3}) gas, the different adsorption/binding sites within the zeolite were investigated as a function of NH{sub 3} loading. Using {sup 15}N MAS NMR multiple sites were resolved that have distinct cross-polarization dynamics and chemical shift behavior. These differences in the {sup 15}N NMR were used to characterize the adsorption environments in both the pure 3A zeolite and the silicone-molded forms of the desiccant

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