Secondary Hydrocarbon Resources: Rethinking When Plastic Is Waste
Secondary Hydrocarbon Resources
A keynote delivered at the Recycling Towards Sustainability Conference in Doha has reopened an old question with new numbers: at what point does a hydrocarbon molecule actually become waste rather than feedstock?
The argument, set out by Johan Grön, is that parts of the plastic stream are being managed as a disposal problem when they are closer to an underused industrial raw material.
The Carbon Is Already Paid For
Polyethylene and polypropylene each hold roughly 85.7 percent carbon by mass, so a tonne of either polymer carries about 857 kilograms of carbon that has already been through extraction, refining, polymerisation, conversion and distribution. Landfilling puts that invested carbon out of reach. Combustion recovers energy but oxidises the carbon instead of returning it to polymer production, producing around 3.14 tonnes of carbon dioxide per tonne on a stoichiometric basis.
The piece is careful not to overreach. Reduction and reuse come first, clean homogeneous streams belong in mechanical recycling, and energy recovery still has a job to do on genuinely non-recyclable residues. The industrial opening is narrower and more specific: mixed PE and PP packaging, films, multilayers and sorting residues that mechanical recycling cannot handle at acceptable cost.
A Regional Test Case
The Gulf Cooperation Council produced an estimated 29 million tonnes of plastics in primary forms in 2024. A 2025 KAPSARC and GPCA study puts regional plastic waste generation at approximately 10 million tonnes a year, of which only around 10 percent is recycled. Production and waste are not a direct material balance, but the gap between polymer capability and end-of-life infrastructure is hard to miss.
If better collection and treatment freed up just 10 to 20 percent of the unrecycled volume, that would amount to roughly 0.9 to 1.8 million tonnes a year of additional recyclable material. GPCA has assessed that pushing regional recycling toward 40 percent could support a circular economy market worth up to USD 6 billion annually, against roughly USD 1 billion of current activity, requiring an estimated USD 12 to 25 billion of investment through 2045 across collection, sorting, mechanical and chemical recycling and secondary raw-material markets.
Integration Is No Longer Theoretical
In 2023 Aramco, TotalEnergies and SABIC processed plastic-waste-derived pyrolysis oil into ISCC PLUS certified circular polymers through existing refinery and petrochemical infrastructure in Saudi Arabia. More recently, Lamor Recycling produced first circular oil from post-consumer plastic at its Kilpilahti plant in Finland on 19 October 2026, with stable continuous output and consistent quality the next hurdles in ramp-up.
On the climate side the article stays measured. A peer-reviewed lifecycle study by Jeswani and colleagues estimated a net impact near 0.74 tonnes of carbon dioxide equivalent per tonne of mixed plastic treated by pyrolysis, some 57 to 61 percent below the energy recovery alternatives assessed. The case, as framed, rests on resource efficiency and industrial value first, with emissions benefit as a supporting argument rather than the headline.
The harder questions now are commercial: reliable feedstock supply, production cost, consistent specification, certification and durable petrochemical demand.
Turn Mixed Polyolefins into Certified Circular Oil
Every one of those harder questions is answered at the plant gate, not in a white paper. Klean Industries delivers plastics conversion facilities with KBR on a performance-guaranteed turnkey basis, so yield, product specification and availability are contractual numbers. That is what makes a project bankable, and it moves delivery risk off the owner’s balance sheet.
Proof matters more than projection in this sector. Our references include commercial-scale thermal conversion plants in operation, among them the commercial recovered carbon black facility in Poland, which is where guarantees on continuous running and consistent product quality come from.
Two commercial routes are open. License the technology and run the asset yourself with our engineering support, or have KBR construct it turnkey and hand over a proven plant. A feasibility study on your own mixed polyolefin streams and offtake agreements is the right first step either way.
Contact Klean Industries » GO.
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