Determination of aromatic and aliphatic C-H groups in coal using Fourier transform infrared spectroscopy
Thesis/Dissertation
·
OSTI ID:5695492
The determination of coal structure is an obdurate problem. Coal is heterogeneous, noncrystalline, and not completely soluble in any known solvent, making spectroscopic analysis of coal especially difficult. Using infrared spectroscopy, information can be gained most readily about hydroxyl, aliphatic C-H, and aromatic C-H groups. The availability of Fourier Transform infrared Spectroscopy (FT-IR) has allowed such information to be obtained faster and more precisely than with earlier vintage dispersive instruments. A method is developed to determine the aromatic and aliphatic C-H content in coal. This involves equating infrared band intensities to elemental hydrogen. This method is initially applied to a set of 11 pyridine coal extracts, also characterized by proton NMR. The NMR measurements of aliphatic and aromatic hydrogen allow direct calibration of the absorption coefficients of appropriate infrared bands. By this means the coefficients determined by relating the infrared band intensities to elemental hydrogen are directly tested. Reasonable agreement between the results from infrared spectroscopy and NMR is obtained. This method is also applied to a set of 35 whole coals and 41 vitrinite concentrate samples. Infrared absorption coefficients and hydrogen content are determined. Aromatic to aliphatic hydrogen ratios thus obtained are compared to those of other workers. Problems associated with equating infrared band intensities to elemental hydrogen are discussed in depth.
- OSTI ID:
- 5695492
- Country of Publication:
- United States
- Language:
- English
Similar Records
FT-IR measurements of aliphatic and aromatic C-H groups in coal
Data base for the analysis of compositional characteristics of coal seams and macerals. Quarterly technical progress report, November 1981-January 1982
Aromatic and aliphatic carbon contents of coals and oil shales by /sup 13/C NMR
Conference
·
Thu Sep 01 00:00:00 EDT 1983
· Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)
·
OSTI ID:6519705
Data base for the analysis of compositional characteristics of coal seams and macerals. Quarterly technical progress report, November 1981-January 1982
Technical Report
·
Sun Aug 01 00:00:00 EDT 1982
·
OSTI ID:6931159
Aromatic and aliphatic carbon contents of coals and oil shales by /sup 13/C NMR
Conference
·
Sat Dec 31 23:00:00 EST 1977
· Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States)
·
OSTI ID:6831431
Related Subjects
01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ABSORPTION SPECTROSCOPY
ALKANES
ALKENES
ALKYNES
AROMATICS
CARBON
CARBONACEOUS MATERIALS
COAL
DATA
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FOURIER TRANSFORM SPECTROMETERS
FUELS
HYDROCARBONS
HYDROGEN
HYDROXYL RADICALS
INFORMATION
INFRARED RADIATION
INFRARED SPECTRA
MACERALS
MAGNETIC RESONANCE
MATERIALS
MEASURING INSTRUMENTS
NONMETALS
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
ORGANIC COMPOUNDS
RADIATIONS
RADICALS
RESONANCE
SPECTRA
SPECTROMETERS
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ABSORPTION SPECTROSCOPY
ALKANES
ALKENES
ALKYNES
AROMATICS
CARBON
CARBONACEOUS MATERIALS
COAL
DATA
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FOURIER TRANSFORM SPECTROMETERS
FUELS
HYDROCARBONS
HYDROGEN
HYDROXYL RADICALS
INFORMATION
INFRARED RADIATION
INFRARED SPECTRA
MACERALS
MAGNETIC RESONANCE
MATERIALS
MEASURING INSTRUMENTS
NONMETALS
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
ORGANIC COMPOUNDS
RADIATIONS
RADICALS
RESONANCE
SPECTRA
SPECTROMETERS
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS