In this work, catalytic pyrolysis of plastic was investigated using the high siliceous ZSM-5 nanocatalysts. The parent nanocatalyst with boron promoter in the structure was prepared by hydrothermal technique. The wet impregnation of molybdenum promoter (0–30 wt.%) was then carried out through a multi-step process. XRD, FT-IR, N₂ adsorption-desorption, FE-SEM, TEM, TG-DTA, and NH₃-TPD techniques were characterized the nanocatalysts. The modified nanocatalyst included the uniform spherical morphology and the homogenous dispersion of Mo species. Mo incorporation improved the concentration and reduced the strength of the acid sites. The NZC25 nanocatalyst had high crystallinity (100%), mesoporous structure (0.08 cm³g⁻¹), and high surface area (259 m²g⁻¹). The effect of different amounts of the promoter and operating conditions were studied on the catalytic activity in dual-zone fixed bed reactor. The NZC25 nanocatalyst had the best activity in catalytic pyrolysis, including high plastic conversion and high liquid product (0.51 g). The optimum operating conditions were 525 °C, catalyst to plastic ratio of 1:10, and N₂ flow rate of 50 mL min⁻¹, which resulted in the highest production (94%) of value-added hydrocarbons (C_6-12). Furthermore, 99.7% of the produced oil was desirable hydrocarbons, including iso-paraffin (3.2%), aromatics (87.3%), and olefins (9.2%). The nanocatalyst showed low coke content (only 1.62%) and high reusability through the sequence cycles, including less than 10% drop of liquid production. The results showed the great capacity of the high siliceous ZSM-5 in the conversion of plastic to value-added hydrocarbons.

在这项工作中，使用高硅质 ZSM-5 纳米催化剂研究了塑料的催化热解。采用水热技术制备了结构中含有硼促进剂的母体纳米催化剂。然后通过多步骤过程进行钼促进剂（0-30 重量％）的湿浸渍。XRD、FT-IR、N ₂吸附-解吸、FE-SEM、TEM、TG-DTA和NH ₃ -TPD技术表征了纳米催化剂。改性纳米催化剂包括均匀的球形形态和 Mo 物种的均匀分散。Mo的掺入提高了酸位的浓度并降低了酸位的强度。NZC25 纳米催化剂具有高结晶度 (100%)、介孔结构 (0.08 cm ³ g ^-1) 和高表面积 (259 m ² g ^-1 )。研究了不同助剂用量和操作条件对双区固定床反应器催化活性的影响。NZC25纳米催化剂在催化热解中具有最佳活性，包括高塑料转化率和高液体产物（0.51 g）。最佳操作条件为 525 °C，催化剂与塑料的比例为 1:10，N ₂流速为 50 mL min ^-1，从而产生了最高（94%）的增值烃（C _{6 - 12}）。此外，99.7% 的产出油是理想的烃类，包括异链烷烃 (3.2%)、芳烃 (87.3%) 和烯烃 (9.2%)。纳米催化剂在整个序列循环中表现出低焦炭含量（仅 1.62%）和高可重复使用性，包括少于 10% 的液体产量下降。结果表明，高硅质 ZSM-5 在将塑料转化为高附加值的碳氢化合物方面具有巨大的能力。