废轮胎回转窑中试热解油的理化性质

Scrap tires were pyrolysed in a pilot-scale kiln reactor at 450 ℃～650 ℃ and properties of the derived oil were investigated. The oil yield reached a maximum of 45.1% at 500 ℃ and then decreased with increasing pyrolytic temperature. A distillation was carried out and complete distillation curves were acquired. It was shown that the weight percentage of the fraction below 200 ℃ amounted to as much as 33%～40% and the increasing of pyrolytic temperature help raise the amount of light fraction. The pyrolytic oil and the oil fractions were subjected to FT-IR analysis, and it was shown that higher pyrolytic temperature resulted in higher aromaticity of the oil. This could be explained by the Diels-Alder route of the primary oil vapor to secondary aromatic compounds. Several aromatics, such as benzene, naphthalene and their alkyl derivatives, could be discriminated from the FT-IR spectra.