Abstract
Distillates of a coal-derived liquid have been separated into compound classes by HPLC. High-voltage GC/MS and low-voltage GC/MS technique have been employed to analyse the individual components and the hydroaromatic group type concentrations in the HPLC fractions.
The result of the analyses shows that the coal-derived solvent contains hydrogen donor compound types (e.g., tetralin, hexahydroacenaphthylene, hydropyrene) and nonhydrogen-donor compound types (e. g., fluorene, acenaphthene, dibenzofuran).
The proton donatable quality index (PDQI) has been calculated from the data of donatable naphthenic hydrogen contents in hydroaromatic species analysed by HPLC and GC/MS method. The PDQI values suggest that the monoaromatic compound class has high hydrogen donatability and the other compound class'es have low hydrogen donatability.
The tendency obtained from HPLC and GC/MS method was in good agreement with that of the naphthenic hydrogen contents estimated by 1H-nmr spectral method.
