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Coperion delivered a twin-screw extruder system to Ghent University in Belgium for the research and development of chemical recycling technology for mixed plastic waste
.
Coperion's ZSK twin-screw extruders are ideal for chemical recycling of mixed plastic waste, because the twin-screw extruders have very good shear heating and devolatilization
Plastic waste, especially post-consumer packaging waste, is often mixed with high concentrations of contaminants
.
As a pioneer in the research and development of chemically recycled plastics, Ghent University has set long-term sustainability goals for the plastics industry and has achieved many very impressive achievements
.
Twin-screw extruder can achieve effective heating of plastic waste
Coperion's twin-screw extruder technology is ideal for chemical plastic recycling processes
.
In less than 30 seconds, plastic waste can be converted from a solid to a homogeneous, effectively devolatilized melt in a twin-screw extruder at temperatures up to 350°C
.
Other ingredients, such as catalysts, can be added and mixed as needed
.
The unique advantages of twin-screw extruders make chemical recycling more competitive
.
Raw material recycling
The melt is further heated to 500°C in the reactor for pyrolysis, and the polymer is cracked into smaller units in an oxygen-free environment
.
Most of the inorganic components in consumer waste remain in the reactor for subsequent removal
.
The organic hydrocarbons in the polymer are evaporated
.
They are converted into monomers, petrochemical feedstocks or syngas, which are then further processed in stills into marketable products such as oils, heavy fuels or waxes
.
Chemical recycling processes are a very hot research topic at Ghent University
.
Although the mechanical recycling of plastics has certain cost advantages, it still encounters some restrictions on domestic pollution and waste sorting
.
With chemical recycling, however, these limitations will be overcome
.
The chemical plastic recycling process is technically and economically a very promising process for the recycling of post-consumer polluting plastic waste
.
The Coperion ZSK twin-screw extruder will be connected to the vortex reactor synthesis unit as part of the chemical recovery system at Ghent University, so that the molten plastic will flow directly into the reactor
.
The conversion of waste plastics into chemicals is currently possible with different technologies such as catalytic pyrolysis and thermochemical treatment (pyrolysis)
.
“We are very honoured to use our expertise and technology to assist the renowned Ghent University in its various research and development activities
in chemical recycling.
We consider chemical recycling to be a pioneering process for recovering raw materials from mixed waste plastics
.
In the long run, this process can protect our valuable resources
.
This customized twin-screw extruder recycling system at Ghent University not only meets the research and development needs of Ghent University, but also for Coperion's customers Experimental support
," says Jochen Schofer, Division Manager Recycling and Direct Extrusion at Coperion
.
