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ASR Gasification Explained: Turning Shredder Residue Into Energy and Materials


ASR Gasification

Gasification is the thermal decomposition of a material in a controlled, oxygen-limited environment, and applied to automotive shredder residue it does what mechanical recycling cannot: it separates the mixed residue into energy, metals and a stable mineral product in a single processing step.

Instead of burning the material, a gasifier converts its organic fraction — the plastics, rubber and fibres — into a combustible synthesis gas, while the inorganic fraction separates into recoverable metals and a molten mineral slag.

How the Reference Plant Does It

Klean’s automotive-shredder-residue facility pairs fluidized-bed gasification with ash melting. Shredder residue is fed directly into the gasifier with no pre-treatment. The syngas fires the plant’s energy recovery, generating 17 MW of electricity from a 2 x 40 MW thermal platform, while the ash is melted into a vitrified slag.

The product slate is deliberately broad. Ferrous metals return to the scrap industry; copper, aluminium and stainless steel are sold to metal markets; the ground glass aggregate goes to construction; zinc-rich filter ash is recycled to the zinc industry. Nothing is simply discarded.

Why This Route Fits the Material

Gasification fits shredder residue because the material’s heterogeneity — the very thing that defeats sorting — does not matter to a process that separates by thermal behaviour. The result is a route that accepts the mix as-is and recovers its full value.

Learn More About ASR Gasification

Partner With The KleanTeam to Gasify Your Residue

Safe. Clean. Profitable. One Proven Partner.

Klean Industries has operated a commercial ASR gasification plant for over two decades — the proof that fluidized-bed gasification and ash melting turn shredder residue into energy, metals and aggregate at scale.

Klean’s Key Advantages:

  • ✅ An operating ASR gasification reference plant treating up to 20 t/h of shredder residue.
  • ✅ Thirty-plus years engineering commercial gasification and waste-to-energy plants.
  • ✅ 3 recovered carbon black (rCB) plants built in India over the past 2 years.
  • ✅ KBR added Klean’s proprietary TyreNova technology to its IP portfolio.

Ready to gasify automotive shredder residue at scale?

Speak with a Solid Waste Expert at Klean Industries » GO.


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