Deconstruction of high-density polyethylene into liquid hydrocarbon fuels and lubricants by hydrogenolysis over Ru catalyst
Deconstruction of high-density polyethylene into liquid hydrocarbon fuels and lubricants by hydrogenolysis over Ru catalyst
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DOI：
10.1016/j.checat.2021.04.002
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发表时间：
2021-07-15
期刊：
影响因子：
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通讯作者：
Lin, Hongfei
中科院分区：
文献类型：
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作者：
Jia, Chuhua;Xie, Shaoqu;Lin, Hongfei
聚乙烯（PE）是全球最受欢迎的塑料，塑料的广泛使用带来了严重的环境问题。目前工艺中的高能耗使其回收成为一个具有挑战性的问题。在我们的报告中，高密度聚乙烯的解聚进行了各种液相溶剂与Ru/C催化剂在相对温和的条件下。喷气燃料和润滑油范围的烃的最大产率分别为60.8和31.6重量%。在优化反应条件（220 ℃和60巴H-2）后，液态烃产物的总产率仅在1小时内就达到约90重量%。产物分布可以通过H2分压、活性金属颗粒尺寸和溶剂来调节。分子动力学模拟结果证实了PE在不同溶剂中的溶剂化作用决定了解聚反应的动力学过程。
Polyethylene (PE) is the most popular plastic globally, and the widespread use of plastics has created severe environmental issues. High energy consumption in the current process makes its recycling a challenging problem. In our report, the depolymerization of high-density PE was conducted in various liquid-phase solvents with the Ru/C catalyst under relatively mild conditions. The maximum yields of the jet-fuel- and lubricant-range hydrocarbons were 60.8 and 31.6 wt %, respectively. After optimization of the reaction conditions (220 C-o and 60 bar of H-2), the total yield of liquid hydrocarbon products reached approximately 90 wt% within only 1 h. The product distribution could be tuned by the H2 partial pressure, the active- metal particle size, and the solvents. The solvation of PE in the different solvents determined the depolymerization reaction kinetics, which was confirmed by the molecular dynamics simulation results.