Converting plastic wastes into fuels through catalytic cracking is continuously gaining interest from researchers worldwide. In this study, the influence of iron on ZSM-5 (Fe-ZSM-5) catalyst on the reforming of the gaseous products of thermal decomposition of low-density polyethylene (LDPE) was investigated. The acidified ZSM-5 catalysts (0, 0.3, 0.6 and 1 wt% of Fe) were prepared and characterized by XRD, BET, FTIR and SEM techniques. In particular, the effects of temperature (400, 450 and 500 °C) and catalyst loading (0.5, 0.75, 1.0, 1.25 and 1.5 g) on a two-stage (pyrolyser and reformer) decomposition of the LDPE wastes into fuel were studied. The liquid fraction produced was characterized using FTIR and GC/MS techniques. The study showed that the increase in pyrolysis temperature (400–500 °C) increases the volume of non-condensable gas (31–58 wt%) and decreases the volume of the condensates (69–41 wt%) in both the thermal and catalytic pyrolyses. However, the trend was at higher level for the catalytic pyrolysis. The increase in temperature for the thermal pyrolysis had less significant effect on the aromatization content of the liquid condensate compared to the catalytic pyrolysis. The FTIR results show a significant increase in aromatic contents and decrease in the aliphatic of the liquid fraction for the catalytic pyrolysis reforming when compared with thermal pyrolysis. The GC/MS results confirmed the aromatic hydrocarbon compositions, predominantly p-xylene, increased relatively to about 70% in the liquid fraction for the best catalyst (1.25 g of catalyst and 1 wt% iron loading on ZSM-5 at 450 °C).

中文翻译：

---

铁改性的ZSM-5催化剂上低密度聚乙烯热解过程中气态产物的催化重整

通过催化裂化将塑料废料转化为燃料的方法不断受到全球研究人员的关注。在这项研究中，研究了铁对ZSM-5（Fe-ZSM-5）催化剂对低密度聚乙烯（LDPE）热分解气态产物重整的影响。制备酸化的ZSM-5催化剂（0、0.3、0.6和1重量％的Fe），并通过XRD，BET，FTIR和SEM技术进行表征。特别是，研究了温度（400、450和500°C）和催化剂负载量（0.5、0.75、1.0、1.25和1.5 g）对LDPE废物两阶段（热解器和重整器）分解成燃料的影响。 。使用FTIR和GC / MS技术对产生的液体馏分进行表征。研究表明，热解温度（400–500°C）的增加会增加非冷凝性气体的体积（31–58 wt％），同时降低热态和热态中的冷凝水体积（69–41 wt％）。催化热解。然而，催化热解的趋势处于较高水平。与催化热解相比，热热解温度的升高对液体冷凝物的芳构化含量的影响较小。FTIR结果显示，与热裂解相比，催化裂解重整中液体馏分的芳族含量显着增加，而液体馏分中的脂肪族则明显减少。GC / MS结果证实，对于最佳催化剂，液体部分中的芳烃成分（主要是对二甲苯）相对增加至约70％（1。