煤の識別に関する研究

概要

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Soot remaining at the scene of an accidental fire is considered to be invaluable evidence after the fuel has been lost. Identifying unknown original fuel by analysis of the remaining soot is useful for investigating the cause of the accidental fire. Small amounts of soot samples produced by the combustion of alkylbezenes, alkanes and plastics were pyrolyzed in a Curie point pyrolyzer and evaluated by GC/MS. Polycyclic compounds such as naphthalene and anthracene were detected commonly in all soots. Specific compounds identified were residual fuels, dealkylation products, elimination products, oxygenated compounds and coupling compounds in the alkylbenzene soots, derivatives of styrene, chlorinated compounds, nitrile compounds and several derivatives from the additives in the plastic soots. These compounds should be the most significant indicators to identify the original fuel by pyrolysis GC/MS analysis, since their profiles are strongly related to the chemical structures of the original fuels and additives. In addition, the profiles of the original fuels, dealkylation products and the elimination products observed in the soots were in good agreement with those observed in the diffusion flame. It is suggested that the soot produced from the combustion of alkylbenzenes and plastics could be indentified by the detection of these specific compounds.
社団法人日本分析化学会の論文
1995-04-05