Photothermal recycling of waste polyolefin plastics into liquid fuels with high selectivity under solvent-free conditions

被引：57
作者：
Miao, Yingxuan [1 ,2 ]
Zhao, Yunxuan [1 ]
Waterhouse, Geoffrey I. N. [3 ]
Shi, Run [1 ]
Wu, Li-Zhu [1 ]
Zhang, Tierui [1 ,2 ]
机构：
[1] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
[3] Univ Auckland, Sch Chem Sci, Auckland 1142, New Zealand
来源：
NATURE COMMUNICATIONS | 2023年 / 14卷 / 01期
基金：
中国国家自然科学基金;
关键词：
POLYETHYLENE FILMS; NORMAL-BUTANE; HYDROGENOLYSIS; MECHANISM; DSC; H-2;
D O I：
10.1038/s41467-023-40005-6
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The widespread use of polyolefin plastics in modern societies generates huge amounts of plastic waste. With a view toward sustainability, researchers are now seeking novel and low-cost strategies for recycling and valorizing polyolefin plastics. Herein, we report the successful development of a photothermal catalytic recycling system for transforming polyolefin plastics into liquid/waxy fuels under concentrated sunlight or xenon lamp irradiation. Photothermal heating of a Ru/TiO2 catalyst to 200-300 & DEG;C in the presence of polyolefin plastics results in intimate catalyst-plastic contact and controllable hydrogenolysis of C-C and C-H bonds in the polymer chains (mediated by Ru sites). By optimizing the reaction temperature and pressure, the complete conversion of waste polyolefins into valuable liquid fuels (86% gasoline- and diesel-range hydrocarbons, C-5-C-21) is possible in short periods (3 h). This work demonstrates a simple and efficient strategy for recycling waste polyolefin plastics using abundant solar energy. Sustainable recycling of waste plastics is of highly strategic significance. Here, the authors report a photothermal recycling system for transforming polyolefin plastics into high-selectivity liquid fuels through the synergistic utilization of ultraviolet, visible, and near-infrared irradiation.
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页数：10
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