scholarly journals Front Cover: Chemical Recycling of End‐of‐Life Poly(lactide) via Zinc‐Catalyzed Depolymerization and Polymerization (ChemistryOpen 12/2020)

ChemistryOpen ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1221-1221
Author(s):  
Even Cheung ◽  
Christoph Alberti ◽  
Stephan Enthaler
Keyword(s):  
End Of Life ◽  
Chemical Recycling ◽  
Front Cover

Evaluation of post-consumer cellulosic textile waste for chemical recycling based on cellulose degree of polymerization and molar mass distribution

2019 ◽  
Vol 89 (23-24) ◽  
pp. 5067-5075 ◽  
Author(s):  
Helena Wedin ◽  
Marta Lopes ◽  
Herbert Sixta ◽  
Michael Hummel
Keyword(s):  
End Of Life ◽  
Intrinsic Viscosity ◽  
Mass Distribution ◽  
Service Sector ◽  
Molar Mass ◽  
Degree Of Polymerization ◽  
Molar Mass Distribution ◽  
Chemical Recycling ◽  
Cellulose Content ◽  
Cellulosic Textiles

The aim of this study is to improve the understanding of which end-of-life cellulosic textiles can be used for chemical recycling according to their composition, wear life and laundering—domestic versus service sector. For that purpose, end-of-life textiles were generated through laboratorial laundering of virgin fabrics under domestic and industrial conditions, and the cellulose content and its intrinsic viscosity and molar mass distribution were measured in all samples after two, 10, 20, and 50 laundering cycles. Results presented herein also address the knowledge gap concerning polymer properties of end-of-life man-made cellulosic fabrics—viscose and Lyocell. The results show that post-consumer textiles from the home consumer sector, using domestic laundering, can be assumed to have a similar, or only slightly lower, degree of polymerization than the virgin textiles (−15%). Post-consumer textiles from the service sector, using industrial laundering, can be assumed to have a substantially lower degree of polymerization. An approximate decrease of up to 80% of the original degree of polymerization can be expected when they are worn out. A higher relative decrease for cotton than man-made cellulosic textiles is expected. Furthermore, in these laboratorial laundering trials, no evidence evolved that the cellulose content in blended polyester fabrics would be significantly affected by domestic or industrial laundering. With respect to molar mass distribution, domestic post-consumer cotton waste seems to be the most suitable feedstock for chemical textile recycling using Lyocell-type processes, although a pre-treatment step might be required to remove contaminants and lower the intrinsic viscosity to 400–500 ml/g.

scholarly journals Catalyzing a Solution

2021 ◽  
Vol 143 (3) ◽  
pp. 42-47
Author(s):  
Castaldi Marco J.
Keyword(s):  
End Of Life ◽  
New Products ◽  
Chemical Recycling ◽  
Industrial Products ◽  
Transportation Fuels ◽  
Plastic Materials

Abstract To meet the ambitious targets ahead of us, all possible processes and technologies must be considered to ensure end-of-life plastics are not disposed in landfills. Chemical recycling can repurpose used plastics into new products, including new plastics, industrial products, and transportation fuels. In addition to creating new products, these technologies keep these plastic materials circulating within the existing infrastructure and economy.

scholarly journals Chemical Recycling of End‐of‐Life Poly(lactide) via Zinc‐Catalyzed Depolymerization and Polymerization

ChemistryOpen ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1223-1223
Author(s):  
Even Cheung ◽  
Christoph Alberti ◽  
Stephan Enthaler
Keyword(s):  
End Of Life ◽  
Chemical Recycling

Chemical recycling of end-of-life tires by intermediate pyrolysis using a twin-auger reactor: Validation in a laboratory environment

2021 ◽  
Vol 159 ◽  
pp. 105298
Author(s):  
Juan Daniel Martínez ◽  
Felipe Campuzano ◽  
Andrés F. Agudelo ◽  
Natalia Cardona-Uribe ◽  
Cindy Natalia Arenas
Keyword(s):  
End Of Life ◽  
Chemical Recycling ◽  
Laboratory Environment ◽  
Auger Reactor ◽  
Intermediate Pyrolysis

scholarly journals Effect of Bio-Based Products on Waste Management

2020 ◽  
Vol 12 (5) ◽  
pp. 2088 ◽  
Author(s):  
Irena Wojnowska-Baryła ◽  
Dorota Kulikowska ◽  
Katarzyna Bernat
Keyword(s):  
Waste Management ◽  
End Of Life ◽  
Energy Recovery ◽  
Plastic Waste ◽  
Management Systems ◽  
Chemical Recycling ◽  
Effective Management ◽  
Mechanical Recycling ◽  
Renewable Materials ◽  
Industrial Composting

This article focuses on the end-of-life management of bio-based products by recycling, which reduces landfilling. Bio-plastics are very important materials, due to their widespread use in various fields. The advantage of these products is that they primarily use renewable materials. At its end-of-life, a bio-based product is disposed of and becomes post-consumer waste. Correctly designing waste management systems for bio-based products is important for both the environment and utilization of these wastes as resources in a circular economy. Bioplastics are suitable for reuse, mechanical recycling, organic recycling, and energy recovery. The volume of bio-based waste produced today can be recycled alongside conventional wastes. Furthermore, using biodegradable and compostable bio-based products strengthens industrial composting (organic recycling) as a waste management option. If bio-based products can no longer be reused or recycled, it is possible to use them to produce bio-energy. For future effective management of bio-based waste, it should be determined how these products are currently being managed. Methods for valorizing bio-based products should be developed. Technologies could be introduced in conjunction with existing composting and anaerobic digestion infrastructure as parts of biorefineries. One option worth considering would be separating bio-based products from plastic waste, to maintain the effectiveness of chemical recycling of plastic waste. Composting bio-based products with biowaste is another option for organic recycling. For this option to be viable, the conditions which allow safe compost to be produced need to be determined and compost should lose its waste status in order to promote bio-based organic recycling.

Tin(ii) 2-ethylhexanoate catalysed methanolysis of end-of-life poly(lactide)

2020 ◽  
Vol 11 (15) ◽  
pp. 2625-2629 ◽  
Author(s):  
Melanie Hofmann ◽  
Christoph Alberti ◽  
Felix Scheliga ◽  
Roderich R. R. Meißner ◽  
Stephan Enthaler
Keyword(s):  
End Of Life ◽  
Chemical Recycling

The depolymerisation of end-of-life poly(lactide) (PLA) goods was studied as part of the chemical recycling of PLA.

scholarly journals Chemical recycling of End-of-Life wind turbine blades by solvolysis/HTL

2020 ◽  
Vol 942 ◽  
pp. 012013
Author(s):  
C Mattsson ◽  
A André ◽  
M Juntikka ◽  
T Tränkle ◽  
R Sott
Keyword(s):  
Wind Turbine ◽  
End Of Life ◽  
Turbine Blades ◽  
Chemical Recycling ◽  
Wind Turbine Blades

scholarly journals Chemical Recycling of End‐of‐Life Poly(lactide) via Zinc‐Catalyzed Depolymerization and Polymerization

ChemistryOpen ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1224-1228
Author(s):  
Even Cheung ◽  
Christoph Alberti ◽  
Stephan Enthaler
Keyword(s):  
End Of Life ◽  
Chemical Recycling

scholarly journals Chemical Recycling of End‐of‐Life Polyamide 6 via Ring Closing Depolymerization

2019 ◽  
Vol 4 (43) ◽  
pp. 12638-12642 ◽  
Author(s):  
Christoph Alberti ◽  
Ruben Figueira ◽  
Melanie Hofmann ◽  
Svetlana Koschke ◽  
Stephan Enthaler
Keyword(s):  
End Of Life ◽  
Polyamide 6 ◽  
Chemical Recycling
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