The generation of polycyclic aromatic hydrocarbons during coking was studied and the contents of 16 PAHs are measured by the devices of ultrasonic abstraction and high performance liquid chromatography for single coal coking and blended coal coking. The results indicate that the amount of generated PAHs during the initial 1~4 hours of coking is the most. Among these PAHs the tetranuclear PAHs has a major portion and the Benzo[a]pyrene which can cause cancer, teratogenesis and mutation was generated in a larger concentration more than emission standard. The two PAHs are the main pollutions of PAHs pollution.
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