. 2020 Jun 25;59(36):15402–15423. doi: 10.1002/anie.201915651

Table 1.

Overview of a selection of Reviews covering various methods for waste plastic processing.

Title: (published date/ first available online)	Process:	Key messages:
Mechanical and chemical recycling of solid plastic waste6 (November 2017)	Mechanical, Pyrolysis	‐ Overview over both mechanical and chemical recycling methods with comparison of limitations, advantages and disadvantages of the different processes ‐ Degradation during mechanical recycling limits closed‐loop recycling although mitigated through stabilizers and compatibilizers ‐ Design For Recycling and From Recycling are important in realizing a circular economy for plastic ‐ Cl and N in waste stream deactivate catalysts in addition to inorganic components blocking pores ‐ Overview and analysis provided of various commercial projects and their status
Solvent‐based separation and recycling of waste plastics: A review7 (June 2018)	Dissolution	‐ Gives details of strong and weak solvents for the various polymer types. ‐ Solvent extraction from recycled polymer can cause damage to the polymer chain due to thermal stress. ‐ Dissolution of mixed polymer streams results in poorer separation of the target polymer. ‐ Future use of hazardous solvents should be reduced
PET Waste Management by Chemical Recycling: A Review8 (September 2008)	Solvolysis	‐ Polyethylene terephthalate (PET) polymer is difficult to purify once formed, so recycling needs to yield a very pure monomer to allow for repolymerization ‐ Large variety of PET available due to differing degrees of crystallinity ‐ Risks that legislation aims at eliminating polymers that have highest potential for recycling, like PET
Chemical recycling of waste plastics for new materials production9 (June 2017)	Solvolysis, Pyrolysis	‐ Hurdles to commercialization are financial incentives and catalyst effectiveness ‐ Unique issues with each type of plastic highlighting the importance of reducing mixed polymer plastics ‐ Progress in design for recycling of polymers will facilitate chemical recycling
Thermochemical routes for the valorization of waste poly‐olefinic plastics to produce fuels and chemicals. A review10 (January 2017)	Pyrolysis	‐ Reactor design and process conditions crucial for tuning product distribution due to heat and mass transfer limitations in processing waste plastic ‐ Importance of (acid) catalyst for reducing reaction temperatures

Title: (published date/ first available online)

Process:

Key messages:

Mechanical and chemical recycling of solid plastic waste6

(November 2017)

Mechanical, Pyrolysis

‐ Overview over both mechanical and chemical recycling methods with comparison of limitations, advantages and disadvantages of the different processes

‐ Degradation during mechanical recycling limits closed‐loop recycling although mitigated through stabilizers and compatibilizers

‐ Design For Recycling and From Recycling are important in realizing a circular economy for plastic

‐ Cl and N in waste stream deactivate catalysts in addition to inorganic components blocking pores

‐ Overview and analysis provided of various commercial projects and their status

Solvent‐based separation and recycling of waste plastics: A review7

(June 2018)

Dissolution

‐ Gives details of strong and weak solvents for the various polymer types.

‐ Solvent extraction from recycled polymer can cause damage to the polymer chain due to thermal stress.

‐ Dissolution of mixed polymer streams results in poorer separation of the target polymer.

‐ Future use of hazardous solvents should be reduced

PET Waste Management by Chemical Recycling: A Review8

(September 2008)

Solvolysis

‐ Polyethylene terephthalate (PET) polymer is difficult to purify once formed, so recycling needs to yield a very pure monomer to allow for repolymerization

‐ Large variety of PET available due to differing degrees of crystallinity

‐ Risks that legislation aims at eliminating polymers that have highest potential for recycling, like PET

Chemical recycling of waste plastics for new materials production9

(June 2017)

Solvolysis, Pyrolysis

‐ Hurdles to commercialization are financial incentives and catalyst effectiveness

‐ Unique issues with each type of plastic highlighting the importance of reducing mixed polymer plastics

‐ Progress in design for recycling of polymers will facilitate chemical recycling

Thermochemical routes for the valorization of waste poly‐olefinic plastics to produce fuels and chemicals. A review10

(January 2017)

Pyrolysis

‐ Reactor design and process conditions crucial for tuning product distribution due to heat and mass transfer limitations in processing waste plastic

‐ Importance of (acid) catalyst for reducing reaction temperatures