蜡
热解
聚乙烯
化学
高密度聚乙烯
原材料
高分子科学
材料科学
化学工程
有机化学
制浆造纸工业
高分子化学
工程类
作者
Marcos Millan,F.J. Mastral,E. Esperanza,J. Ceamanos
出处
期刊:Energy & Fuels
[American Chemical Society]
日期:2002-08-24
卷期号:16 (5): 1148-1153
被引量:40
摘要
This work studies the influence of temperature on the distribution of liquid and solid products obtained in the pyrolysis of high density polyethylene in a bubbling fluidized bed. The compositions of the products obtained vary widely depending on the operating conditions. The solid fraction (waxes) is markedly olefinic, with high molecular weight alkenes of up to sixty carbon atoms. The liquid fraction is a mixture of olefins and aromatic compounds. The gaseous fraction shows a high heating value of up to 35900 kJ/Nm3 at around 750−780 °C, and can be used for electricity generation. A limiting factor for this use is the presence of tars. The gas yield was analyzed by GC, while waxes and oils were analyzed using MS/GC. The results show that when the temperature increases, cracking of heavier olefinic fractions occurs to yield lighter fractions and higher concentrations of aromatics are obtained in the liquid fraction. The formation of polyaromatic hydrocarbons is also analyzed.
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