Mahmudur Rahman, B. Mondal, Nafees Ahmed, Md. Delwar Hossain
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引用次数: 0
摘要
使用二氧化硅-氧化铝催化剂，在氮气环境下于 450 °C 成功催化热解了废高密度聚乙烯和低密度聚乙烯。合成的二氧化硅-氧化铝是介孔的，显示出 IV 型等温线。热裂解（不使用任何催化剂）在 485 ℃ 时产生了 47% 的蜡状碳氢化合物。另一方面，使用二氧化硅-氧化铝催化剂从废弃的高密度聚乙烯和低密度聚乙烯中获得了 80% 以上的液体产量。在催化剂与塑料的比例为 1:25 时，低密度聚乙烯的液体产率（87.69%）高于高密度聚乙烯（83.25%）。1H NMR 显示，液体产品不含任何芳香族化合物。气相色谱-质谱、1H NMR 和傅立叶变换红外光谱证实液体中含有直链和支链烷烃和烯烃。47(2); 195-203: December 2023
Catalytic pyrolysis of waste high-density (HDPE) and low-density polyethylene (LDPE) to produce liquid hydrocarbon using silica-alumina catalyst
Catalytic pyrolysis of waste HDPE and LDPE polyethylene was successfully carried out using a silica-alumina catalyst at 450 °C under N2 atmosphere. The synthesized silica-alumina is mesoporous and shows type IV isotherm. Thermal pyrolysis (without any catalyst) provided 47% wax-like hydrocarbons at 485 °C. On the other hand, more than 80% liquid yield was achieved using silica-alumina catalysts from waste HDPE and LDPE. The highest liquid yield was obtained from LDPE (87.69%) than HDPE (83.25%) at a catalyst-to-plastic ratio of 1:25. The 1H NMR shows that the liquid product does not contain any aromatic compound. The GC-MS, 1H NMR, and FTIR confirmed that the liquid contains linear and branched alkanes and alkenes.
J. Bangladesh Acad. Sci. 47(2); 195-203: December 2023
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