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Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
Published on: November 30, 2020
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Glycolysis of Poly(Ethylene Terephthalate) Using Biomass-Waste Derived Recyclable Heterogeneous Catalyst
Samson Lalhmangaihzuala1,2, Zathang Laldinpuii1,2, Chhakchhuak Lalmuanpuia1,2
1Department of Chemistry, Pachhunga University College Campus, Mizoram University, Aizawl 796001, Mizoram, India.
Polymers
|December 30, 2020
Summary
Researchers developed a novel catalyst from waste orange peels to efficiently depolymerize poly(ethylene terephthalate) (PET) plastic into its monomer. This eco-friendly method offers a promising solution for plastic recycling and waste management.
Area of Science:
- Materials Science
- Environmental Chemistry
- Catalysis
Background:
- Global plastic production has surged, leading to significant environmental pollution.
- Poly(ethylene terephthalate) (PET) is a common plastic with limited recycling options.
Purpose of the Study:
- To develop a sustainable and efficient catalyst for PET depolymerization.
- To utilize waste biomass for creating an environmentally friendly catalyst.
Main Methods:
- Preparation of a heterogeneous catalyst from waste orange peel (orange peel ash - OPA).
- Characterization of the OPA catalyst using various analytical techniques (IR, ICP-OES, XRD, XRF, SEM, EDX, TEM, BET, TGA).
- Depolymerization of PET using the OPA catalyst and analysis of the product (bis(2-hydroxyethyl terephthalate) - BHET).
Main Results:
- The OPA catalyst exhibits basic sites, high surface area, and a mesoporous structure.
- Complete depolymerization of PET was achieved in 90 minutes.
- Recrystallized BHET yield reached 79% with high catalytic activity over 5 reuse cycles.
Conclusions:
- The waste-derived OPA catalyst is effective for PET depolymerization.
- The process is eco-friendly and demonstrates potential as a greener route for PET recycling.
- The catalyst's reusability and efficiency support its application in sustainable plastic waste management.
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