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| Research progress on targeted conversion of waste plastic to high-value chemicals |
| Received:December 26, 2024 |
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| KeyWord:plastic waste;high value chemicals;low carbon olefins;aromatic hydrocarbons;plastic monomer;upgrading and reengineering;low carbon emission reduction |
| Author Name | Affiliation | E-mail | | DU Xiangrui | College of Public Administration, Nanjing Agricultural University, Nanjing 210095, China | | | DING Heng | Institute of Organic Contaminant Control and Soil Remediation, Nanjing Agricultural University, Nanjing 210095, China | dingheng1863@163.com | | GAO Yanzheng | Institute of Organic Contaminant Control and Soil Remediation, Nanjing Agricultural University, Nanjing 210095, China | |
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| Abstract: |
| In recent years, global plastic production has continued to increase, yet a large amount of plastic waste is scattered in the environment, which not only seriously threatens ecological safety but also leads to a huge waste of resources. Converting plastic waste into oil products through chemical recycling offers an important pathway for achieving the high-value conversion and utilization of low-value resources. However, with the onset of the "carbon peaking and carbon neutrality goals" era and the shift in China ′ s oil refining consumption structure toward cleaner, low-carbon alternatives, the transition from oil to chemicals has become a key focus in the restructuring of the energy industry. Therefore, converting waste plastics into high-value chemicals not only aligns with the "waste-totreasure" waste management strategy but also supports the achievement of the "carbon peaking and carbon neutrality goals". Here, we summarized the technologies for the high-value utilization of plastic waste, including new methods such as thermal pyrolysis, catalytic cracking, solvent depolymerization, electrochemical processes, photocatalysis, and biotransformation. Subsequently, we focused on the research progress in using these technologies to depolymerize and recombine polymer plastic products, generating high-value chemicals （such as low-carbon olefins, aromatic hydrocarbons, acids, alcohols, aldehydes, and plastic monomers） through cracking and polymerization, catalytic conversion, and bioconversion. The transformation pathways mainly include "plastic waste-monomers, oligomers, and other intermediateS-high value chemicals" and "plastic waste-high value chemicals". Finally, some issues about the future research in this field were addressed. |
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