【摘要】 热解反应在中温段(450～650℃)进行,油产率可达42.7%～45.0%.对热解油进行了实沸点蒸馏和红外光谱(FTIR)分析.热解油品质较轻,200℃以下轻馏分质量分数高达33%～40%,热解温度的升高有助于增加轻馏分质量分数.在较高热解温度下热解油具有较强的芳香性.热解油FTIR分析结果体现了芳烃类物质生成的DielsAlder反应途径.热解炭产率约为39%～44%,并具有高灰分(>12%)和高硫特性.热解炭具有较发达的中、大孔.在550℃前,热解炭比表面积随热解温度升高而增大;温度继续升高,比表面积变化不大.热解炭孔容积随热解温度升高而增大,并在550℃时达到最大值.在孔径约为50nm处,热解炭比孔容积具有最大值.更多还原

【Abstract】 Scrap tires were pyrolyzed at 450—650 ℃, and the oil yield was 42.7%—45.0%. The complete distillation curves of oil were acquired. The light fraction below 200 ℃ amounted to as much as 33%—40% and increased with pyrolysis temperature. Fourier transform infrared spectroscopy (FT-IR) analysis of the pyrolytic oil showed that higher pyrolytic temperature yielded more aromatics in the oil. This phenomenon could be explained by the Diels[CD*2]Alder route of the primary oil vapor to secondary aromatic compounds. The yield of pyrolytic char was about 39%—44%. Pyrolytic char contained relatively high content of ash (>12%) and sulfur. The char had fairly developed mesopores and macropores. The surface area of the pyrolytic char increased with pyrolysis temperature before 550 ℃,while it was relatively stable at higher temperature. The pore volume of pyrolytic char increased with pyrolysis temperature and reached the maximum at 550 ℃. The maximum specific pore volume of char occurred at 50 nm pore diameter.更多还原