Abstract
Traditional Polyethylene terephthalate (PET) disposal methods are mainly mechanical recycling, landfill and incineration, which have some problems such as poor quality of recycled products and environmental pollution. By comparison, the products of chemical recycling can be resynthesized into PET, saving petrochemical resources and reducing environmental pollution. In view of this, some recent chemical recycling methods that convert waste PET into value-added monomers are summarized in this paper. For instance, PET can be reduced by hydrogen into terephthalic acid or other valuable products. And it can be decomposed into bis(2-hydroxyethyl) terephthalate in the presence of ethylene glycol and catalysts such as magnetic metal oxides. Also, it can be hydrolyzed into terephthalic acid and ethylene glycol by green catalyst. Besides, it can be pyrolyzed into benzene catalyzed by non-noble metal oxides. Finally, several possible strategies have been proposed to help convert waste PET into value-added monomers.
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