Identification of phenyl-substituted polycyclic aromatic compounds in ring furnace gases using GC-MS and GC-AED
- 107 Downloads
The ring furnace baking process is an intermediate step in the production of graphite electrodes. In this process coal tar pitch is pyrolized to form amorphous carbon and volatile aromatic and polycyclic aromatic compounds (PACs). These gaseous ring furnace emissions were analysed by GC-MS and GC-AED. As a result of the pyrolytic reactions taking place, several phenyl-substituted PACs are generated, which were identified by their chromatographic retention indices and mass spectra. Pure reference compounds were analysed for verification if available. A number of phenyl-PACs are reported to be present in coal tar-related material, including phenylpyridines and phenyldibenzofurans previously unreported. A formation scheme for phenyl-dibenzofurans on the basis of a radical mechanism is proposed.
Key WordsGas chromatography Mass selective detector Atomic emission detector Furnace gases Phenyl-substituted PAC Coal tar pitch
Unable to display preview. Download preview PDF.
- G. Collin, H. Höke, in “Ullmann's Encyclopedia of Industrial Chemistry”, Vol.A26, VCH, Weinheim, 1995, p.91.Google Scholar
- O. J. Vohler, F. von Sturm, E. Wege, in “Encyclopedia of Applied Physics”, Vol.3, VCH, Weinheim, 1992, p.21.Google Scholar
- E. Fitzer, K. Müller, W. Schäfer, in P. L. Walker, (Ed.), “Chemistry and Physics of Carbon”, Vol.7, Marcel Dekker, New York, 1971, p.237.Google Scholar
- O. J. Vohler, F. von Sturm, E. Wege, H. von Kienle, M. Voll, P. Kleinschmit, in “Ullmann's Encyclopedia of Industrial Chemistry”, Vol.A5, VCH, Weinheim, 1986, p.95.Google Scholar
- I. C. Lewis, L. S. Singer, inP. L. Walker, (Ed.), “Chemistry and Physics of Carbon”, Vol.17, Marcel Dekker, New York, 1981, p.1.Google Scholar
- R. Meyer zu Reckendorf, private report, 1990.Google Scholar