Nuclear magnetic resonance studies on coals, coal-conversion products, and coal-conversion catalysts. Final technical report
Technical Report
·
OSTI ID:5878695
Solid-state nuclear magnetic resonance (NMR) experiments have been carried out on several sets of samples submitted by the Pittsburgh Energy Technology Center. Most of these experiments were /sup 13/C cross polarization (CP) experiments. These measurements were all carried out at 15.1 MHz, using the following spectrometers: a home-built system based on a Varian 12-in electromagnet, with a Nicolet 1180 data system, and a home-modified JEOL-FX-600 spectrometer. The two spectrometers gave consistent results and approximately equal levels of performance (e.g., signal-to-noise ratios). CP/MAS /sup 13/C spectra of all of the samples studied are collected in this report. All of them were obtained using 1-ms contact times. In addition, some /sup 29/Si MAS spectra were obtained on zeolite samples. These spectra were obtained at 39.7 MHz on a modified wide-bore Nicolet NT-200 spectrometer with a home-built MAS probe. In preparing this final report, we have standardized the partitioning of the /sup 13/C CP/MAS spectra into two alternate schemes. In one scheme the spectrum is divided arbitrarily into an aliphatic region (95 ppM to -10 ppM) and an aromatic region (the remainder of the spectrum, including spinning sidebands. This partitioning gives the f'/sub a/ values (apparent aromatic fraction) reported in the tables. 37 figures, 4 tables.
- Research Organization:
- Colorado State Univ., Fort Collins (USA). Dept. of Chemistry
- DOE Contract Number:
- AC22-81PC41767
- OSTI ID:
- 5878695
- Report Number(s):
- DOE/PC/41767-T1; ON: DE83016455
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
04 OIL SHALES AND TAR SANDS
040500 -- Oil Shales & Tar Sands-- Properties & Composition
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
COAL
COAL LIQUIDS
DATA
ENERGY SOURCES
EXPERIMENTAL DATA
FLUIDS
FOSSIL FUELS
FUELS
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUIDS
MAGNETIC RESONANCE
MATERIALS
MEASURING INSTRUMENTS
MINERALS
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
OIL SHALES
RESONANCE
SPECTRA
SPECTROMETERS
STRUCTURAL CHEMICAL ANALYSIS
ZEOLITES
010600* -- Coal
Lignite
& Peat-- Properties & Composition
04 OIL SHALES AND TAR SANDS
040500 -- Oil Shales & Tar Sands-- Properties & Composition
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
COAL
COAL LIQUIDS
DATA
ENERGY SOURCES
EXPERIMENTAL DATA
FLUIDS
FOSSIL FUELS
FUELS
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUIDS
MAGNETIC RESONANCE
MATERIALS
MEASURING INSTRUMENTS
MINERALS
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
OIL SHALES
RESONANCE
SPECTRA
SPECTROMETERS
STRUCTURAL CHEMICAL ANALYSIS
ZEOLITES