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采用单光子离子化/共振增强的多光子离子化-飞行时间质谱法(SPI/REMPI-TOFMS)研究了在汽车钢板的回收冶炼过程中,涂覆油漆的裂变行为。在模拟实验装置中,在线跟踪监测了裂解炉气中的有机裂变产物的演变过程。发现与其它有机材料不同,汽车钢板的涂覆油漆不仅在合成空气中,而且在氮气中也产生酚类有机污染物。从300℃到1 190℃都有多环芳烃(PAHs)产生,但在700~800℃时,产生的数量最多,在1 000~1 190℃,趋于完全燃烧。
The single photon ionization / resonance enhanced multiphoton ionization-time of flight mass spectrometry (SPI / REMPI-TOFMS) was used to study the fission behavior of paint during the recovery and smelting process of automobile steel plate. In a simulation experiment, the evolution of organic fission products in the pyrolysis furnace gas was monitored on-line. It was found that unlike other organic materials, automotive steel coating paints not only in synthetic air, but also in organic nitrogen compounds. Polycyclic aromatic hydrocarbons (PAHs) were produced from 300 ℃ to 1 190 ℃, but they were most abundant at 700-800 ℃ and almost completely at 1000-119 ℃.