Effectiveness of CO2-mediated pyrolysis for the treatment of biodegradable plastics: A case study of polybutylene adipate terephthalate/polylactic acid mulch film

Kim, Soosan; Yang, Wooyoung; Lee, Hee Sue; Tsang, Yiu Fai; Lee, Jechan

doi:10.1016/j.jclepro.2022.133763

Cited by 27 publications

(3 citation statements)

References 44 publications

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“…Thermochemical conversion is recently used in the recovery of biodegradable plastics, especially biodegradable straws , and mulch film due to a simple process and wide tolerance to mixed wastes. However, the conversion process was usually conducted at a high reaction temperature (above 400 °C) and therefore consumed a large amount of energy.…”

Section: Introductionmentioning

confidence: 99%

Approach for the Low Carbon Footprint of Biodegradable Plastic PBAT: Complete Recovery of Its Every Monomer via High-Efficiency Hydrolysis and Separation

Shen

Zhang²,

Long

et al. 2023

ACS Sustainable Chem. Eng.

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Biodegradable plastics are considered one of the solutions to solve the environmental pollution caused by plastic waste. However, on easy-to-collect occasions, recovery of biodegradable plastics is a preferable option rather than biodegradation, since it can fully utilize carbon resources and reduce carbon emissions. Herein, efficient and eco-friendly recycling of widely used biodegradable plastic, polybutylene adipate terephthalate (PBAT), was demonstrated by alkaline hydrolysis in the solution of ethanol and H 2 O. The degradation ratio of PBAT was achieved above 99% at 80 °C for 50 min. Diacid salts were self-precipitated out from the reaction solution, followed by acidification to obtain diacid monomers. The reaction solution after filtrating away the diacid salts can be recycled several times without sacrificing the degradation ratio of PBAT, while 1,4-butanediol monomer can be further recovered by the two-step mild distillation at 80 °C. The carbon emission of the whole recycling process was evaluated, and it was only half of that of the biodegradation. The work provides new insight into the recycling of biodegradable plastics.

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Section: Introductionmentioning

confidence: 99%

Approach for the Low Carbon Footprint of Biodegradable Plastic PBAT: Complete Recovery of Its Every Monomer via High-Efficiency Hydrolysis and Separation

Shen

Zhang²,

Long

et al. 2023

ACS Sustainable Chem. Eng.

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“…The thermocatalytic process can convert biomass and plastic waste into value-added (oxygenated) hydrocarbons (HCs) and syngas with rapid conversion of solid plastic mixture [27][28][29][30][31][32][33]. A majority of previous research on plastic pyrolysis has focused on upcycling of a single plastic component such as polyethylene and polypropylene rather than practical plastic waste [34][35][36][37][38][39]. However, thermocatalytic upgrading of deposable wet wipes was rarely investigated though their large production and environmental problems as mentioned above.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ni/Al2O3 catalyst treatment condition on thermocatalytic conversion of spent disposable wipes

Lee

Jung

Lee

et al. 2023

Korean J. Chem. Eng.

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Municipal solid waste (MSW) management is an essential municipal service. Proper waste treatment is an important part of the waste management. Thermocatalytic waste upcycling has recently gained great interest and attention as a method to extract value from waste, which potentially substitutes traditional waste treatment methods. This study aims at demonstrating the potential for thermocatalytic waste upcycling using spent disposable wipes as an MSW surrogate. Two different Ni/Al 2 O 3 catalysts were prepared, treated under two different atmospheres (N 2 and CO 2 ). The catalyst treated in N 2 (Ni/Al 2 O 3 -N 2 ) exhibited a higher surface metallic Ni site than the catalyst treated in CO 2 (Ni/Al 2 O 3 -CO 2 ). The use of the Ni/Al 2 O 3 -N 2 increased the yield of gas pyrolysate and decreased the yield of byproduct (e.g., wax), compared with no catalyst and the Ni/Al 2 O 3 -CO 2 . In particular, the Ni/Al 2 O 3 -N 2 catalyst affected the generation of gaseous hydrogen (H 2 ) by increasing the H 2 yield by up to 102% in comparison with the other thermocatalytic systems. The highest H 2 yield obtained with the Ni/Al 2 O 3 -N 2 was attributed to the most surface metallic Ni sites. However, the Ni/Al 2 O 3 -N 2 catalyst led to char having a lower higher heating value than the other catalysts due to its lowest carbon content. The results indicated that the reduction treatment environment for Ni/Al 2 O 3 catalyst influences thermocatalytic conversion product yields of spent disposable wipes, including enhanced H 2 production. Electronic Supplementary Material Supplementary material is available in the online version of this article at 10.1007/s11814-023-1461-8.

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“…First, the specific heat capacity of N 2 was the smallest and that of H 2 O was the highest; and, the higher the specific heat capacity, the higher the energy requirement to increase at the same temperature. Second, CO 2 promoted the breaking of O-H and C-H bonds and the thermal cracking of pyrolytic volatiles [31]. H 2 O produced free radicals (such as H• and OH•) under the catalytic effects of CO gas and intrinsic minerals in the atmosphere.…”

mentioning

confidence: 99%

Study on the pyrolysis behavior and kinetics of Jimusar oil shale with H2O/CO2 injection

Huang,

Kang,

Yang

et al. 2023

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Effectiveness of CO2-mediated pyrolysis for the treatment of biodegradable plastics: A case study of polybutylene adipate terephthalate/polylactic acid mulch film

Cited by 27 publications

References 44 publications

Approach for the Low Carbon Footprint of Biodegradable Plastic PBAT: Complete Recovery of Its Every Monomer via High-Efficiency Hydrolysis and Separation

Approach for the Low Carbon Footprint of Biodegradable Plastic PBAT: Complete Recovery of Its Every Monomer via High-Efficiency Hydrolysis and Separation

Effects of Ni/Al2O3 catalyst treatment condition on thermocatalytic conversion of spent disposable wipes

Study on the pyrolysis behavior and kinetics of Jimusar oil shale with H2O/CO2 injection

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