Analysis of coal conversion recycle solvents by liquid chromatography with nuclear magnetic resonance detection

Journal Article · Tue Dec 01 04:00:00 EST 1981 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00237a046· OSTI ID:5590302

Haw, J F; Glass, T E; Dorn, H C

The analyses of two coal conversion recycle process solvents, one of them hydrotreated, via high-performance liquid chromatography (HPLC) with a continuous flow nuclear magnetic resonance (NMR) detector are reported. The differences between these samples with reference to the role of the solvent in coal liquefaction are discussed. The LC-/sup 1/H NMR technique characterized the hydrocarbons and aromatic ethers with a level of certainty not possible with conventional detectors. In addition, qualitative GC-MS analysis of off-line LC fractions was performed on the recycle solvent sample. LC-/sup 1/H NMR and LC-GC-MS were found to be complementary for volatile samples. Gel permeation chromatography-/sup 1/H nuclear magnetic resonance (GPC-/sup 1/H NMR) analysis of the recycle solvent sample was not as successful as LC-/sup 1/H NMR since class separation is almost essential for this sample. But the introduction of GPC-/sup 1/H NMR is still of interest since GPC is the most appropriate mode of separation for many samples.

• Research Organization: Virginia Polytechnic Institute and State Univ., Blacksburg
• OSTI ID: 5590302
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 53:14; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104 -- Spectral Procedures-- (-1987)
400105* -- Separation Procedures
CHROMATOGRAPHY
COAL LIQUEFACTION
COAL LIQUIDS
COMPARATIVE EVALUATIONS
DATA
EXPERIMENTAL DATA
FLUIDS
GAS CHROMATOGRAPHY
INFORMATION
LIQUEFACTION
LIQUID COLUMN CHROMATOGRAPHY
LIQUIDS
MASS SPECTROSCOPY
NMR SPECTRA
NUMERICAL DATA
ORGANIC SOLVENTS
RECYCLING
SEPARATION PROCESSES
SOLVENTS
SPECTRA
SPECTROSCOPY
THERMOCHEMICAL PROCESSES