No abstract

Studies have been carried out, of the influence of the chlorine content of both aliphatic and aromatic compounds on the structure of the carbon deposits formed on a silica surface by pyrolysis at 850-950 °C. The results show that the more highly chlorinated compounds give rise to carbons in which the crystals are smaller and the preferred orientation and (001) habit of the crystallites are less marked than in those derived from organic compounds containing little or no chlorine. The differences in carbon structure are ascribed to the decreased mobility of the carbon atoms in presence of hydrogen chloride or chlorine.