A leading industrial gases company wanted to understand how gases such as nitrogen, carbon dioxide, and oxygen are being used across PET recycling processes.
The client wanted to identify where industrial gases were already being used, where they created measurable process value, and where future demand could emerge as PET recycling technologies scale.
GreyB conducted a structured technology and market assessment across PET depolymerisation and purification pathways, with a focus on food-grade recycling and commercially relevant European opportunities.
The core constraint was clear: the client did not only need a map of gas usage. They needed to know where industrial gases could become a commercial enabler in PET recycling, especially in food-grade and bottle-to-bottle recycling.
PET recycling gas applications were fragmented across process stages
The PET recycling landscape is fragmented across mechanical recycling, chemical recycling, decontamination, depolymerisation, purification, and repolymerisation steps.
Each technology uses gases differently, and in many cases, the value of gas integration depends on the process design, quality requirements, and target end product.
The client needed to understand:
- Where gases are used across PET recycling and purification technologies
- Which gases are used at different stages of the process
- Why gases are included or excluded in specific technology configurations
- Which applications create near-term demand versus future opportunities
- Which recyclers and technology providers could become relevant partners or customers
- Where gas integration could improve process efficiency, product quality, or differentiation
The objective was to separate low-value gas usage from high-value gas-enabled process opportunities. This helped the client identify where gases were simply being consumed, where they improved process performance, and where future recycling technologies could create new demand.
Gas-enabled opportunities were mapped across decontamination, extrusion, melt filtration, drying etc.
The assessment showed that process gases can support value creation across multiple PET recycling routes.
Gas usage appeared across decontamination, extrusion, melt filtration, drying, crystallization, solid-state polycondensation, depolymerisation, purification, and repolymerisation.
In mechanical recycling, gases are mainly used to maintain product quality during high-temperature processing. They help create controlled atmospheres, remove moisture and volatiles, reduce oxidation-related degradation, and support consistent polymer performance during extrusion, drying, crystallization, and purification stages.
In chemical recycling, gases are used more selectively but can play a critical role in process control. They help reduce unwanted side reactions during depolymerisation, support purification of intermediate streams, assist in volatile removal, and protect the quality of recovered monomers or polymers.
High-value gas use cases were separated from standard utility applications
The client’s core question was not simply where gases are used in PET recycling. It was where gas usage creates enough process value to justify commercial focus.
For an industrial gas company, this distinction is important because some applications use gases only as standard utilities, while others depend on gases to improve food-grade quality, remove contaminants, prevent oxidation, stabilize polymer properties, or enable process scale-up.
The analysis focused on three commercial decisions:
- Prioritize high-value process stages where gases influence product quality, process efficiency, or regulatory readiness.
- Identify customer and partnership opportunities among recyclers and technology providers using gas-intensive or gas-enabled processes.
- Spot emerging recycling routes where gas applications could become important as the technology scales.
The assessment compared gas-based and non-gas recycling configurations to understand why gases were used in some technologies and excluded in others. This helped identify where gas integration was essential, where it was optional, and where it could create future value through improved quality, efficiency, or process control.
Emerging opportunities appeared in advanced decontamination and supercritical-fluid-assisted recycling routes
The assessment identified emerging opportunities in advanced decontamination and supercritical-fluid-assisted recycling routes.
These processes are still developing commercially, but they indicate a future opportunity where gases could support cleaner extraction, improved mass transfer, lower solvent dependency, and more sustainable recycling pathways.
Overall, the strongest opportunities exist where gas usage directly improves contaminant removal, food-grade quality, process efficiency, polymer stability, or technology scale-up.
This positions gases not merely as utilities, but as process enablers for higher-value recycled PET.
Customer and partnership opportunities were linked to technical gas-use cases
The analysis connected gas applications with market potential. Recycling pathways were analyzed, demand potential was estimated, relevant technology providers and recyclers were identified, and opportunities were highlighted where industrial gas companies could explore partnerships, supply opportunities, or value-added services.
The work helped the client classify PET recycling opportunities by commercial relevance.
Existing gas-use processes helped validate near-term demand and identify customer segments where gases were already tied to quality or process performance.
Emerging gas-enabled technologies helped identify future growth spaces where the client could position early through partnerships, application development, or targeted business development.
This gave the client a clearer basis to decide where to prioritize, where to monitor, and where gas usage was unlikely to create differentiated value.
High-potential gases, priority recycling stages, and partner segments were identified
The analysis revealed the most promising gas-enabled opportunities that could support PET recycling quality, process efficiency, and future circularity goals.
Recommendations covered high-potential gases, priority recycling stages, emerging technologies, and potential partner or customer segments.
The analysis helped the client identify where industrial gas solutions could create stronger business value.
For companies working in PET recycling, the key challenges often include:
- Preventing oxidation, discoloration, and polymer degradation during high-temperature processing.
- Removing contaminants, volatiles, moisture, and residues to achieve food-grade recycled PET.
- Improving process efficiency while managing gas consumption and operating costs.
- Identifying emerging recycling technologies where gases can improve performance or enable scale-up.
- Finding partners that can support reliable gas supply, process optimization, and application-specific integration.
Which PET Recycling Technologies Will Define The Next Decade?
Industrial gas companies, recyclers, and technology providers need to know where gases are technically valuable, commercially relevant, and strategically positioned to support the next generation of high-quality recycled plastics. This requires separating broad PET recycling research from gas-use cases that improve contaminant removal, food-grade quality, process efficiency, polymer stability, or scale-up potential.
For teams assessing PET recycling opportunities, internal technical validation must sit alongside supplier scouting, process benchmarking, and commercial prioritization. GreyB helps clients move from broad research, patent noise, supplier claims, and early-stage recycling concepts to validated, commercially viable solutions through packaging innovation consulting..
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