舶用ディーゼル排ガス中に含まれる多環芳香族炭化水素類の分析

概要

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Polycyclic Aromatic Hydrocarbons (PAHs) are formed by incomplete combustion of fuels and discharged into the environment. Some compounds have been identified as carcinogenic, mutagenic, and teratogenic. Exhaust gas from a 4 stroke marine diesel engine was trapped in the resin and filters, and PAHs were analyzed by GC/MS. The relationship between PAHs emissions and the engine operating condition was examined. The results show that as the engine load increases, SOF concentration decreases. Low-molecular PAHs in gaseous state were trapped in the resin. On the other hand, high-molecular PAHs bound to particulate matter were trapped in the filter. PAHs emissions were highest when the engine was operated at 25% load using Heavy Fuel Oil (HFO). Highly toxic PAHs were also detected at this operating condition. PAHs from exhaust gas using HFO were more than those of Marine Diesel Oil. It is necessary to monitor and a accumulate data of PAHs emissions in the exhaust gas of marine diesel engines.
公益社団法人日本マリンエンジニアリング学会の論文