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Title: Advanced NMR characterization of zeolite catalysts. Fourth quarterly report, 1 June 1984-31 August 1984

Abstract

The program discussed in this report is a two-year two-phase joint UOP-University of Illinois study of the application of improved high resolution solid state nuclear magnetic resonance (NMR) techniques to the characterization of zeolite catalysts. During the first phase of this program very pure, and in some cases isotopically enriched faujasites will be prepared and studied by magic angle sample spinning NMR (MASS NMR) and variable angle sample spinning NMR (VASS NMR) on 500 and 360 MHz (Proton frequency) NMR spectrometers. The NMR techniques that will be emphasized are the measurement and analysis of the /sup 17/O NMR properties, /sup 27/Al NMR intensity quantitation, and /sup 27/Al and /sup 29/Si NMR relaxation rates. During the second phase of this program these NMR techniques will be used to study the effects of impurity concentration, dealumination treatments and cation exchange on the NMR properties of faujasites. The initial emphasis of this program during Phase I is on the preparation and measurement of the NMR properties of /sup 17/O enriched Na-Y faujasites. The main efforts during the fourth three-month period of the program continue to be the characterization of the /sup 17/O enriched zeolites, particularly X and Y zeolites, by both static andmore » sample spinning /sup 17/O NMR. The main emphasis has been on obtaining NMR data with both hydrated and calcined samples and simulating the static /sup 17/O NMR line. The complex /sup 17/O NMR spectrum can be simulated by two quadrupolar spectra, one coming from oxygen in a Si-O-Si configuration and one from oxygen in an Al-O-Si configuration. Good simulations have been obtained for zeolite A (only Si-O-Al), dealuminated zeolite Y (mainly Si-O-Si) and zeolite Y with a Si/Al ratio of about 2.8. 1 figure, 1 table.« less

Authors:
Publication Date:
Research Org.:
Signal UOP, Inc., Des Plaines, IL (USA). Research Center
OSTI Identifier:
6361970
Report Number(s):
DOE/PC/60779-4
ON: DE85000456
DOE Contract Number:  
FG22-83PC60779
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ZEOLITES; CHEMICAL PREPARATION; NMR SPECTRA; STRUCTURAL CHEMICAL ANALYSIS; ALUMINIUM 27; EXPERIMENTAL DATA; FAUJASITE; NMR SPECTROMETERS; OXYGEN 17; RESEARCH PROGRAMS; SILICON 29; ALUMINIUM ISOTOPES; DATA; EVEN-ODD NUCLEI; INFORMATION; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; ISOTOPES; LIGHT NUCLEI; MATERIALS; MEASURING INSTRUMENTS; MINERALS; NUCLEI; NUMERICAL DATA; ODD-EVEN NUCLEI; OXYGEN ISOTOPES; SILICATE MINERALS; SILICON ISOTOPES; SPECTRA; SPECTROMETERS; STABLE ISOTOPES; SYNTHESIS; 400201* - Chemical & Physicochemical Properties

Citation Formats

Welsh, L B. Advanced NMR characterization of zeolite catalysts. Fourth quarterly report, 1 June 1984-31 August 1984. United States: N. p., 1984. Web.
Welsh, L B. Advanced NMR characterization of zeolite catalysts. Fourth quarterly report, 1 June 1984-31 August 1984. United States.
Welsh, L B. Sat . "Advanced NMR characterization of zeolite catalysts. Fourth quarterly report, 1 June 1984-31 August 1984". United States.
@article{osti_6361970,
title = {Advanced NMR characterization of zeolite catalysts. Fourth quarterly report, 1 June 1984-31 August 1984},
author = {Welsh, L B},
abstractNote = {The program discussed in this report is a two-year two-phase joint UOP-University of Illinois study of the application of improved high resolution solid state nuclear magnetic resonance (NMR) techniques to the characterization of zeolite catalysts. During the first phase of this program very pure, and in some cases isotopically enriched faujasites will be prepared and studied by magic angle sample spinning NMR (MASS NMR) and variable angle sample spinning NMR (VASS NMR) on 500 and 360 MHz (Proton frequency) NMR spectrometers. The NMR techniques that will be emphasized are the measurement and analysis of the /sup 17/O NMR properties, /sup 27/Al NMR intensity quantitation, and /sup 27/Al and /sup 29/Si NMR relaxation rates. During the second phase of this program these NMR techniques will be used to study the effects of impurity concentration, dealumination treatments and cation exchange on the NMR properties of faujasites. The initial emphasis of this program during Phase I is on the preparation and measurement of the NMR properties of /sup 17/O enriched Na-Y faujasites. The main efforts during the fourth three-month period of the program continue to be the characterization of the /sup 17/O enriched zeolites, particularly X and Y zeolites, by both static and sample spinning /sup 17/O NMR. The main emphasis has been on obtaining NMR data with both hydrated and calcined samples and simulating the static /sup 17/O NMR line. The complex /sup 17/O NMR spectrum can be simulated by two quadrupolar spectra, one coming from oxygen in a Si-O-Si configuration and one from oxygen in an Al-O-Si configuration. Good simulations have been obtained for zeolite A (only Si-O-Al), dealuminated zeolite Y (mainly Si-O-Si) and zeolite Y with a Si/Al ratio of about 2.8. 1 figure, 1 table.},
doi = {},
url = {https://www.osti.gov/biblio/6361970}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {9}
}

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