Application of carbon-13 solid-state high-resolution NMR to the study of proton mobility. Separation of rigid and mobile components in coal structure

Journal Article · Thu Oct 23 04:00:00 EDT 1986 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100280a026· OSTI ID:6964001

Tekely, P; Nicole, D; Brondeau, J; Delpuech, J J

A pulse sequence, in which /sup 13/C CP/MAS NMR signals are monitored after the partial transverse relaxation of attached hydrogens, is described for indirect measurement of T/sub 2//sup */ relaxation times of protons in solid materials. The method was independently applied to the discrimination between rigid/macromolecular and mobile/molecular components in two coal samples for aromatic and aliphatic protons. Closely similar T/sub 2//sup */ values are obtained for aromatic and aliphatic protons in the rigid component, while they differ by a factor of Ca. 2 in the mobile component. A predominance of aromatic hydrogens was found in the mobile component with even an absence of aliphatic hydrogens for the higher rank coal sample.

• Research Organization: Universite de Nancy, France
• OSTI ID: 6964001
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:22; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
CARBON 13
CARBON ISOTOPES
CARBONACEOUS MATERIALS
COAL
DATA
ENERGY SOURCES
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
INFORMATION
ION MOBILITY
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
MATERIALS
MOBILITY
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
NUCLEI
NUMERICAL DATA
PARTICLE MOBILITY
RESONANCE
SPECTRA
STABLE ISOTOPES