plastic pyrolysis

Much of the plastic the world discards is too mixed or contaminated for mechanical recycling, so it ends up in landfill or is burned. Pyrolysis offers a chemical route that turns those difficult plastics back into reusable outputs.

Why Conventional Recycling Falls Short

Mechanical recycling depends on clean, sorted, single-polymer streams. When plastics are mixed, soiled, or layered, they fail to sort cleanly, and a large share of that material is rejected before it ever reaches a pellet line. The result is that a meaningful portion of plastic waste still moves toward disposal rather than recovery, even in regions with mature recycling infrastructure.

What Plastic Pyrolysis Is

Pyrolysis heats plastic in the near-absence of oxygen, breaking long polymer chains into smaller molecules. Unlike incineration, which burns material in air, pyrolysis decomposes it thermally so the feedstock is converted rather than combusted. For a grounding in the fundamentals, see what pyrolysis is and how it applies to a plastic pyrolysis project.

What the Process Produces

The output is a slate of three streams. A liquid oil fraction can be refined toward fuels or chemical feedstocks. A non-condensable gas can be captured and reused to heat the process. A solid char remains as a carbon-rich residue with potential material value. Because the products are distinct, a well-designed plant can align each stream to a specific offtake market rather than settling for a single outlet.

Feedstocks That Fit

Pyrolysis is best understood as the layer beneath mechanical recycling. It accepts contaminated films, multi-layer packaging, and mixed polymer blends that standard sortation rejects, widening the pool of recoverable material. Feedstock character — moisture, contamination, and polymer mix — drives both plant design and product quality, so a project starts with the material, not the machinery.

The Commercial Case

For a developer, the appeal is clear: pyrolysis recovers value from feedstocks other routes cannot process while diverting them from landfill. Success still depends on feedstock quality control, product offtake, and careful plant design, which is why projects typically begin with a feasibility study before capital is committed.

Pyrolysis is not a substitute for reducing and reusing plastic. It sits further along the recovery chain, handling what prevention and mechanical recycling leave behind and helping close the loop toward a circular economy.

Learn More:

• What is pyrolysis?
• Klean’s plastic pyrolysis projects
• Pyrolysis oil as a recovered product
• Feasibility studies for pyrolysis projects

Recover Value From Difficult Plastics

Plastic pyrolysis turns a disposal problem into a recovered-resource opportunity. If you are evaluating a plastic-to-value project, start with the feedstock and offtake questions that decide whether a plant will work.

Wondering whether your plastic stream is a fit?

Contact Klean Industries about plastic pyrolysis » GO.