Low-temperature catalytic upgrading of waste polyolefinic plastics into liquid fuels and waxes
Low-temperature catalytic upgrading of waste polyolefinic plastics into liquid fuels and waxes
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DOI：
10.1016/j.apcatb.2020.119805
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发表时间：
2021-05-15
影响因子：
22.1
通讯作者：
Tomishige, Keiichi
中科院分区：
文献类型：
--
作者：
Nakaji, Yosuke;Tamura, Masazumi;Tomishige, Keiichi
提出了一种利用多相催化剂低温催化废旧聚烯烃塑料制取液体燃料和石蜡等有价值的化学品的方法。CeO2负载的Ru(Ru/CeO2)是一种高效、可重复使用的多相催化剂，在低密度聚乙烯的氢解反应中表现出比其他金属负载催化剂高得多的活性，即使在较温和的反应条件下，如低温473K和低氢压2 Mpa，也能提供液体燃料(C5-C21)和蜡油(C22-C45)，产率分别为77%和15%(总收率92%)。该催化剂适用于各种低密度聚乙烯、高密度聚乙烯、聚丙烯的氢解，以较高的产率(83-90%)提供有价值的化学品(液体燃料+蜡)。此外，商业塑料袋和废聚乙烯可以高产量(91%和88%)转化为有价值的化学品。
A new low-temperature catalytic upgrading of waste polyolefinic plastics to valuable chemicals such as liquid fuels and waxes by a heterogeneous catalyst is presented. CeO2-supported Ru (Ru/CeO2) acted as an effective and reusable heterogeneous catalyst, showing much higher activity than other metal-supported catalysts in hydrogenolysis of low-density polyethylene, and the catalyst worked even under mild reaction conditions such as low temperature of 473 K and low H-2 pressure of 2 MPa, providing liquid fuel (C5-C21) and wax (C22-C45) in 77 % and 15 % yields (total 92 % yield), respectively. This catalyst was applicable to hydrogenolysis of various low density polyethylenes, high-density polyethylene, polypropylene to provide the valuable chemicals (liquid fuel + wax) in high yields (83-90 %). Furthermore, a commercial plastic bag and waste polyethylenes could be transformed to the valuable chemicals in high yields (91 % and 88 % yields).