49 Binder Etal2010
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Transcript of 49 Binder Etal2010
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4. Results
Comparison of Evergreen Caprolactam and Virgin Caprolactam
Evergreen Caprolactam Hotspot Analysis
Life Cycle Assessment of Caprolactam production from Nylon 6 carpet recycling
Marc Binder (1), Stefan Albrecht (2), Coppelia Marincovic (1), Laura Flanigan (3), Dennis McGavis (4)
(1) PE Americas, (2) LBP‐GaBi University of Stuttgart, (3) Five Winds International, (4) Shaw Inc.
1. Goal of the Study
Obtain an understanding of the environmental impacts of Evergreen caprolactam
Secure an understanding of how this impact is distributed through the production process (hotspot analysis)
Compare the Environmental impacts of Evergreen caprolactam to virgin caprolactam, to get a quantitative assessment of the environmental benefits of producing a product made out of recycled carpet waste rather than virgin material (based on crude oil)
Support external communication of environmental performance of Shaw’s recycled caprolactam by Shaw’s Evergreen process
2. Scope of the Study
System boundaries
Functional Unit: 1,000 lb [=453.6 kg] of caprolactamGeographical coverage: USTime coverage: 2007Software and Background data: GaBi 4 and databasesAllocation methodology: Economic allocationCritical Review Panel (according to ISO 14.40/14044):
‐ Joep Meijer, President, TheRightenvironment Ltd.Co. (Chair), LCA expert‐ Bob Peoples, Ph.D., Director, ACS Green Chemistry Institute, expert in carpet chemistry and recycling efforts in the industry‐ Jon Wybar, Revolution Recovery LLC/Construction Waste Management, expert in recovery and recycling infrastructure
3. Modeling (continued)
Virgin Caprolactam
5. InterpretationSensitivity analysis:
Sensitivity of key parameters
Transportation distance
Allocation methodology
Conclusions
Manufacturing of caprolactam made from recovered Nylon 6 carpets by the Evergreen process show environmental benefits for all impact categories and the consumption of fossil energy sources compared to the manufacturing of virgin caprolactamTransportation: although shorter transportation distances related to the
collection of old carpet have a lower environmental impact, the impact is not of significance for the environmental performance of recycled caprolactam from the Evergreen processEnergy consumption drives the profiles of recycled caprolactam – For all impact
categories the energy consumption of the Evergreen process dominates the environmental profile (> 95%).Allocation methodology – sensitivity analysis showed the applied allocation
methodology has an influence on the absolute reduction of the environmental impact when using caprolactam from Evergreen process compared to virgin. However Evergreen caprolactam even showed a lower impact for all impact categories as well for the consumption of fossil energy sources once all effort is allocated to recycled caprolactam and nothing to the byproduct.
3. Modeling
Evergreen Caprolactam
For more information: c.marincovic@pe‐international.com