Spanner Re² GmbH has been committed to optimising the use of resources for many years. Re²'s proven biomass power plants generate electricity and heat not only from wood waste, but also from many other alternative fuels such as nut shells, vine shoots, roadside greenery, waste wood and plastics.

According to the German Federal Environment Agency, the amount of plastic waste collected in Germany alone is around 6.28 million tonnes per year. Around 53 per cent of this is used to generate energy in waste incineration plants or cement works. Around 40,000 tonnes of collected plastic waste is not recycled each year. This means that it is landfilled or incinerated in plants without energy recovery. This untapped potential of plastic waste generated by industry or the recycling sector can be used profitably.

Clean synthesis gas from (high calorific) plastic waste

Together with a renowned research institute, Spanner Re² GmbH has been operating a test plant for several years that produces clean synthesis gas from various types of plastic waste. The plastic waste is shredded or processed into compactates and gasified together with wood chips in the Re² gasifier plant. The resulting synthesis gas can be converted directly into electricity via a combined heat and power (CHP) plant. The process also generates heat that can be used for other purposes, such as supplying district heating networks.

Plastic waste tested for energy production:

  • Mixed plastics from LVP and industrial waste
  • PET trays, PS cups from LVP
  • LVP sorting residues (coarse, medium, fine)
  • Shredded PEX (pipes) / 3D plastic waste
  • EPS from dismantling and refurbishment
  • Paper industry rejects


Use shredded or compacted

Plastic waste often has a high specific volume for a low mass. By processing it into compactates, i.e. shredding, cleaning and compacting the plastic fractions, a storage-stable, odourless and transport-efficient energy source is obtained. Processing also prevents segregation due to density differences in the feedstock mixture and ensures a stable gasification process.

Compactates from plastic fractions

Mixture of wood chips and compactates from plastic waste

The shredded plastic waste, together with wood chips as fuel, is automatically fed into the gasification plant via a screw conveyor.

Chalk can be added to increase the process-related formation of syngas and to reduce the formation of oil and tar through its catalytic action. Chalk also absorbs chlorine and other and prevents the formation of dioxins and furans.



Gasification of the plastic fractions and electricity generation in the CHP unit

In the heart of the Re² system - the reformer - a clean syngas is produced from the plastic chip mixture using a thermochemical process, see picture on the right. The gas can be converted into electricity or used directly as synthesis gas for other industrial processes.


reformer process gasification plants from Spanner Re²


Convincing advantages

Go forward into a sustainable future weith Re² 


Clean & cheap energy

Our technology helps reduce CO2 emissions and promotes sustainable energy production.

Highly flexible

Our systems are scalable and can be adapted to meet the specific needs of your business.

Cost reduction

By using local waste materials, you can significantly reduce your operating costs and increase your value chain.


Are you interested?
Find out more about generating energy from plastic waste in our Waste to Energy folder or contact us directly for advice.

Folder Waste-to-energy


Do you have any questions?

Get in touch with us.
We look forward to hearing from you.

Contact us

  • Spanner Re² GmbH
    Niederfeldstr. 38
    D - 84088 Neufahrn i. NB
  • This email address is being protected from spambots. You need JavaScript enabled to view it.
  • +49 8773 70798-0

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