What question did this study set out to answer?

Establish a transparent, quantitative baseline evaluating economic viability, environmental impacts, and circularity metrics for closed-loop plastic recycling technologies across common commercial polymers.

January 12, 2023ACS Sustainable Chemistry & EngineeringOpen Access

Technical, Economic, and Environmental Comparison of Closed-Loop Recycling Technologies for Common Plastics

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Authors

TUTaylor UekertNational Renewable Energy Laboratory ASAvantika SinghMedical College of Wisconsin JDJason S. DesVeauxNational Renewable Energy Laboratory

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Implication

Comparative assessment reveals trade-offs between cost, environmental impact, and product quality across plastic recycling methods, highlighting optimal routes for circular polymer management.

Key Points

Establish a transparent, quantitative baseline evaluating economic viability, environmental impacts, and circularity metrics for closed-loop plastic recycling technologies across common commercial polymers.
Evaluated mechanical recycling, solvent-based dissolution, enzymatic hydrolysis, glycolysis, and vapor methanolysis for polyethylene, polyethylene terephthalate (PET), and polypropylene.
Modeled 11 key performance metrics, including minimum selling price, greenhouse gas emissions, energy, land, and water use, waste generation, toxicity, and contamination tolerance.
Conducted sensitivity analyses and multicriteria decision analyses to identify critical operational cost drivers and environmental hotspots.
Mechanical recycling and PET glycolysis achieved the lowest minimum selling prices (9%–73% lower) and the lowest environmental burdens (7%–88% lower) relative to competing systems.
Solvent-based dissolution, enzymatic hydrolysis, and vapor methanolysis produced the highest recyclate material qualities, exceeding alternatives by 2%–27%.
Process electricity, process steam, and organic solvent consumption constituted the largest operational contributors to overall cost and environmental impact profiles.

Cite This Study

Uekert et al. (2023) studied this question.

synapsesocial.com/papers/69d7db74a2a48916bbbee218 https://doi.org/10.1021/acssuschemeng.2c05497

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Implication

Comparative assessment reveals trade-offs between cost, environmental impact, and product quality across plastic recycling methods, highlighting optimal routes for circular polymer management.

Technical, Economic, and Environmental Comparison of Closed-Loop Recycling Technologies for Common Plastics

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Key Points

Cite This Study

Technical, Economic, and Environmental Comparison of Closed-Loop Recycling Technologies for Common Plastics

Discussion

Member takes

Implication

Key Points

Cite This Study

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