High-Field Aluminum-27 Solid-State NMR Studies of Catalytic Zeolites and Weathered Clay Materials
EMSL Project ID
3991
Abstract
We propose the study of a number of zeolite and weathered clay materials using high-field aluminum-27 solid-state NMR spectroscopy. In each of two sets of materials, acquisition of spectra using magnetic fields in excess of 17.6 T has been shown to resolve overlapping resonances from tetrahedral aluminum species. In zeolite systems under consideration here, the distribution of aluminum atoms among tetrahedral framework sites correlates with changes in catalytic activity, while in weathered clay systems aluminosilicate neophases formed via reaction with simulated tank waste leachate solutions have been quantified via high-field resolution of tetrahedral resonances. It is essential to perform experiments at the highest field strengths possible in order to resolve and quantify the important aluminum-containing phases in these materials, and therefore we are requesting use of the Varian Inova 800 MHz system in the high-field magnetic resonance laboratory at EMSL. While previous results from weathered clay systems have been successfully obtained, these continuing studies will focus on new samples obtained after further reaction of weathered materials with less harsh environmental conditions resembling post-waste water flow at contaminated sites. For the zeolite materials studied, catalytic activity measured at Penn State will be correlated with T-site distributions as measured by high-field solid-state NMR. It is anticipated that both of these studies will produce data publishable in peer-reviewed scientific journals.
Project Details
Project type
Capability Research
Start Date
2004-02-23
End Date
2005-02-23
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members
Related Publications
1 S.K.Gangwal, Velu Subramani, and David A Green. Evaluation of a Long-Term Fischer-Tropsch Test and the Resulting Spent Iron Catalyst. AIChE Spring Meeting, April 23, 2007, Houston, Texas, USA
Robidart JC, SJ Callister, PF Song, CD Nicora, CG Wheat, and PR Girguis. 2013. "Characterizing Microbial Community and Geochemical Dynamics at Hydrothermal Vents Using Osmotically Driven Continuous Fluid Samplers." Environmental Science & Technology 47(9):4399-4407. doi:10.1021/es3037302
Zarzycki PP, SME Chatman, T Preocanin, and KM Rosso. 2011. "Electrostatic Potential of Specific Mineral Faces." Langmuir 27(13):7986-7990. doi:10.1021/la201369g