Pyrolysis and Resource Recovery from Packaging Waste

Packaging waste comprises a substantial fraction of municipal and industrial refuse, with multilayer materials such as Tetra Pak cartons and pharmaceutical blister packs presenting acute recycling challenges. Traditional mechanical separation often fails to disentangle plastic, paper and metal layers, while thermal incineration forfeits valuable hydrocarbons and metals. Pyrolysis, the thermal decomposition of organic matter in an oxygen-limited environment, offers a versatile route to depolymerise plastics, liberate oils and gases of utilitarian calorific value, and concentrate residual metals or char. By tuning process parameters—temperature, residence time and heating rate—and incorporating catalysts, practitioners can steer product distributions towards light olefins, aromatic hydrocarbons, syngas or char suitable for soil amendment or activated carbon feedstocks. Concurrently, metal-bearing residues can yield secondary aluminium or iron with minimal oxidation. Recent advances in reactor design, catalytic formulations and integration of downstream separation demonstrate the growing maturity of pyrolysis as a tool for circular-economy valorisation of complex packaging waste streams.

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Pyrolysis and Resource Recovery from Packaging Waste publication trend

The graph below shows the total number of articles in pyrolysis and resource recovery from packaging waste across all publications each year (not limited to Nature Index journals).

Technical terms

Pyrolysis: Thermal breaking of chemical bonds in organic materials under oxygen-limited conditions, producing char, liquid oils and combustible gases.

Catalytic pyrolysis: Pyrolysis conducted in the presence of solid catalysts to lower activation energies and direct product selectivity towards desired hydrocarbons.

Char: Carbon-rich solid residue remaining after pyrolysis, valuable as a precursor to activated carbon or as a soil amendment.

Calorific value: Amount of energy released upon complete combustion of a fuel, typically expressed in megajoules per kilogram.

Thermogravimetric analysis: Technique measuring mass change of a sample as temperature varies, used to identify decomposition steps and optimise pyrolysis conditions.

References

1. Catalytic Pyrolysis of Tetra Pak over Acidic Catalysts. Catalysts (2020).
2. Influence of Temperature on the Composition and Calorific Value of Gases Produced during the Pyrolysis of Waste Pharmaceutical Blisters. Applied Sciences (2020).
3. Aluminum Recovery From Multimaterial Tetra-Pak Waste Pyrolysis. Civil And Environmental Engineering Reports (2019).