Coal structure at reactive sites by sup 1 H- sup 13 C- sup 19 F double cross polarization (DCP)/MAS sup 13 C NMR spectroscopy

Conference · Sun Jan 01 00:00:00 EST 1989

OSTI ID:5725227

Hagaman, E W; Woody, M C ^[1]

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1. Oak Ridge National Lab., TN (USA)

The solid state NMR technique, {sup 1}H-{sup 13}C-{sup 31}P double cross polarization (DCP)/MAS {sup 13}C-NMR spectroscopy, uses the direct dipolar interaction between {sup 13}C-{sup 31}P spin pairs in organophosphorus substances to identify the subset of carbons within a spherical volume element of 0.4 nm radius centered on the {sup 31}P atom. In combination with chemical manipulation of coals designed to introduce phosphorus containing functionality into the organic matrix, the NMR experiment becomes a method to examine selectively the carbon bonding network at the reactive sites in the coal. This approach generates a statistical structure description of the coal at the reaction centers in contrast to bulk carbon characterization using conventional {sup 1}H-{sup 13}C CP/MAS {sup 13}C NMR spectroscopy. 3 refs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5725227
• Report Number(s): CONF-891001-4; ON: DE89013549
• Resource Relation: Conference: International conference on coal science, Tokyo (Japan), 23-27 Oct 1989
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COAL
MOLECULAR STRUCTURE
CARBON 13
CHEMICAL BONDS
FLUORINE 19
HYDROGEN 1
NMR SPECTRA
PHOSPHORUS 21
POLARIZATION
SPECTROSCOPY
CARBON ISOTOPES
CARBONACEOUS MATERIALS
ENERGY SOURCES
EVEN-ODD NUCLEI
FLUORINE ISOTOPES
FOSSIL FUELS
FUELS
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MATERIALS
NUCLEI
ODD-EVEN NUCLEI
PHOSPHORUS ISOTOPES
SPECTRA
STABLE ISOTOPES
010600* - Coal
Lignite
& Peat- Properties & Composition
400102 - Chemical & Spectral Procedures