Aluminum coordination and active sites on aluminas, Y zeolites and pillared layered silicates. Progress report, June 1, 1990--January 31, 1992
Our work has been deployed in four directions, namely, (1) Study of the distribution of aluminum within three possible kinds of coordination shells: four-fold (IV), five-fold (V), and six-fold (VI), in aluminas and dealuminated zeolites by high-resolution solid state NMR or magic angle NMR. Besides the classical one pulse spectra, nutation spectra have been studied. (2) Study of the electron deficient sites by electron paramagnetic resonance (EPR) of probe molecules on aluminas and decationated zeolites. Electron deficient sites are considered as Lewis sites. (3) Study of the model isomerization reaction 1 butene {yields} 2 cis or trans butene on the aluminas characterized in 1 and 2. (4) Synthesis of a silicate lattice in which silicon has been partially replaced by aluminum. The chosen silicate is that of the zeolite (fibrous) sepiolite. It has been characterized as indicated in 1 and 2.
- Research Organization:
- Wisconsin Univ., Milwaukee, WI (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG02-90ER14130
- OSTI ID:
- 10123002
- Report Number(s):
- DOE/ER/14130--T2; ON: DE92007406
- Country of Publication:
- United States
- Language:
- English
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Aluminum coordination and active sites on aluminas, Y zeolites and pillared layered silicates
Aluminum coordination and active sites on aluminas, Y zeolites and pillared layered silicates. Progress report, June 1, 1990--August 31, 1991
Related Subjects
360602
360606
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201
ALUMINIUM OXIDES
BUTENES
CATALYTIC EFFECTS
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES
CHEMICAL COMPOSITION
ELECTRON SPIN RESONANCE
ISOMERIZATION
LEWIS ACIDS
NUCLEAR MAGNETIC RESONANCE
PHYSICAL PROPERTIES
PROGRESS REPORT
SEPIOLITE
STRUCTURE AND PHASE STUDIES
ZEOLITES