Chemical characterization of coal tar and coal derived liquid based on their separation by high performance liquid chromatography analyzed by FI-MS measurements.

Abstract

For the purpose of obtaining information on chemical components of coal tar, a method combining the use of HPLC and field ionization-MS (FI-MS), together with the computer, was developed to conveniently characterize coal derived liquids. Separation by HPLC is carried out by connecting to the cyano column, a pack with sample-deposited teflon powder. By supplying the various carriers having gradually increased polarity, 4 fractions were obtained with single stage chromatography. Assuming the and aromatic rings as the apparent unsaturated extent to define the U, the FI-MS data were presented in a tabular form with 14 columns by the computer so that members of any homologous series appear in the same column. The components in coal tar were classified into about 40 identifiable chemical types. The values of the ultimate analysis and the 1H-NMR analysis were used supplementally for identifying the components by each chemical type.

Effects of Rapid-heating and/or High-pressure Conditions on Coke Making, Examined Using a Synthetic Model Compound

“…Coal contains small molecules with Mw of 200-500; 14) some of these molecules have a naphthalene structure (two aromatic rings), 15,16) which can enhance the softening and melting properties of coal. 17) Considering the purpose of this study, the model compound was required to be solid at room temperature and liquid during heating; it was also required to have a boiling point of approximately 500°C.…”