Characterization of the microstructure and macrostructure of coal-derived asphaltenes by nuclear magnetic resonance spectrometry and X-ray diffraction

Journal Article · Sat Jan 01 04:00:00 EST 1983 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00252a014· OSTI ID:6043516

Schwager, I

Structural characterisation studies have been carried out on coal-derived asphaltenes from 5 major demonstration processes in the US: PAMCO SRC, Catalytic Inc. SRC, H-Coal, Synthoil and FMC-COED. Elemental, molecular weight, proton NMR, and functional group analyses have been used to calculate average molecular properties of the asphaltenes. The macrostructure and crystallite parameters of these asphaltenes were studied by X-ray diffraction methods. A combined NMR-X-ray procedure was used to estimate the size of the average aromatic structural unit and the number of such aromatic structural units per molecule.

• OSTI ID: 6043516
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 55:1; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ASPHALTENES
ASPHALTS
BITUMENS
COAL LIQUEFACTION
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
LIQUEFACTION
MAGNETIC RESONANCE
MICROSTRUCTURE
MOLECULAR WEIGHT
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
RESONANCE
SCATTERING
SPECTRA
STRUCTURAL CHEMICAL ANALYSIS
TAR
THERMOCHEMICAL PROCESSES
X-RAY DIFFRACTION