Sustainable Advance of Cl Recovery from Polyvinyl Chloride Waste Based on Experiment, Simulation, and Ex Ante Life-Cycle Assessment

Lu, Jiaqi; Kumagai, Seiji; Fukushima, Yasuhiro; Ohno, Hiroki; Borjigin, Siqingaowa; Kameda, Tomohito; Saito, Yuko

doi:10.1021/acssuschemeng.1c04067

“…For a bench-scale ball mill reactor, a 50-min treatment is necessary for achieving complete separation of 65-g cable waste 23 , in which the throughput and energy efficiency are not optimised. Assuming the operating power of ball milling as 100 W 57 , the electricity consumption is 1.28 kWh/kg separated cable waste, resulting in a 0.85 kg CO 2 -e/kg separated cable waste of GHG emissions based on the current power grid of Japan. Thus, even though the lab-scale treatment efficiency is low, the avoided GHG emissions would be far higher than the additionally produced ones.…”

Section: Discussionmentioning

confidence: 99%

Neural network based prediction of the efficacy of ball milling to separate cable waste materials

Lu

¹

,

Han

²

,

Kumagai

³

et al. 2023

Self Cite

View full text Add to dashboard Cite

Material recycling technologies are essential for achieving a circular economy while reducing greenhouse gas emissions. However, most of them remain in laboratory development. Machine learning (ML) can promote industrial application while maximising yield and environmental performance. Herein, an asynchronous-parallel recurrent neural network was developed to predict the dynamic behaviour when separating copper and poly(vinyl chloride) components from the cable waste. The model was trained with six datasets (treatment conditions) at 3600 epochs. High accuracy was confirmed based on a mean-square error of 0.0015–0.0145 between the prediction and experimental results. The quantitative relationship between the input features and the separation yield was identified using sensitivity analysis. The charged weight of cables and impact energy were determined as the critical factors affecting the separation efficiency. The ML framework can be widely applied to recycling technologies to reveal the process mechanism and establish a quantitative relationship between process variables and treatment outputs.

show abstract

“…[5] Tour et al were able to convert a mixture of plastic wastes containing PVC into flash graphene via flash Joule heating. [6] Additionally, Yoshioka et al have developed the Cl recovery process, [7] which entails the dechlorination of PVC in NaOH/ethylene glycol (EG) solvent by ball-milling and treating the Cl ion dissolved in EG by electro-dialysis for the simultaneous recovery of NaCl and EG.…”

Section: Introductionmentioning

confidence: 99%

Metamorphosis of a Commodity Plastic like PVC to Efficient Catalytic Single‐Chain Nanoparticles

Blazquez‐Martín,

Verde‐Sesto,

Arbe

et al. 2023

View full text Add to dashboard Cite

We perform the conversion of a commodity plastic of common use in pipes, window frames, medical devices, flexible hoses, etc. like polyvinyl chloride (PVC) to single‐chain nanoparticles (SCNPs). SCNPs are versatile, protein‐mimetic soft nano‐objects of growing interest for catalysis, sensing, and nanomedicine, among other uses. We demonstrate that the metamorphosis process ‐as induced through metal‐free click chemistry‐ leads to well‐defined, uniform SCNPs that are stable during storage in the solid state for months. All the conversion process (from PVC isolation to PVC‐SCNPs synthesis) can be run in a green, dipolar aprotic solvent and involving, when required, a simple mixture of ethanol and water (1/1 vol.) as non‐solvent. The resulting PVC‐SCNPs are investigated as recyclable, metalloenzyme‐mimetic catalysts for several representative Cu(II)‐catalyzed organic reactions. The method could be valid for the metamorphosis and valorization of other commodity plastics in which it is feasible to install azide functional groups in their linear polymer chains.

show abstract

Metamorphosis of a Commodity Plastic like PVC to Efficient Catalytic Single‐Chain Nanoparticles

Blazquez‐Martín,

Verde‐Sesto,

Arbe

et al. 2023

Angewandte Chemie

0

View full text Add to dashboard Cite

We perform the conversion of a commodity plastic of common use in pipes, window frames, medical devices, flexible hoses, etc. like polyvinyl chloride (PVC) to single‐chain nanoparticles (SCNPs). SCNPs are versatile, protein‐mimetic soft nano‐objects of growing interest for catalysis, sensing, and nanomedicine, among other uses. We demonstrate that the metamorphosis process ‐as induced through metal‐free click chemistry‐ leads to well‐defined, uniform SCNPs that are stable during storage in the solid state for months. All the conversion process (from PVC isolation to PVC‐SCNPs synthesis) can be run in a green, dipolar aprotic solvent and involving, when required, a simple mixture of ethanol and water (1/1 vol.) as non‐solvent. The resulting PVC‐SCNPs are investigated as recyclable, metalloenzyme‐mimetic catalysts for several representative Cu(II)‐catalyzed organic reactions. The method could be valid for the metamorphosis and valorization of other commodity plastics in which it is feasible to install azide functional groups in their linear polymer chains.

show abstract

Sustainable Advance of Cl Recovery from Polyvinyl Chloride Waste Based on Experiment, Simulation, and Ex Ante Life-Cycle Assessment

Cited by 11 publications

References 70 publications

Neural network based prediction of the efficacy of ball milling to separate cable waste materials

Neural network based prediction of the efficacy of ball milling to separate cable waste materials

Metamorphosis of a Commodity Plastic like PVC to Efficient Catalytic Single‐Chain Nanoparticles

Metamorphosis of a Commodity Plastic like PVC to Efficient Catalytic Single‐Chain Nanoparticles

Contact Info

Product

Resources

About