From flue gas to feedstock: What Flue2Chem tells us about the future of sustainable chemicals

For many organisations, defossilisation has understandably begun with energy. Electrifying assets, improving efficiency and securing renewable power are tangible, measurable steps that demonstrate progress. 

However, for chemical manufacturers, consumer goods brands and advanced materials companies, energy is only part of the picture. The more complex challenge lies in the carbon embedded within the products themselves. 

Most sustainability strategies are framed around Scope 1, 2 and 3 emissions. Scope 1 relates to direct operational emissions; Scope 2 covers purchased energy; and Scope 3 – often the most significant and least controllable – captures emissions across the wider value chain, including the carbon intensity of raw materials and intermediates. 

For many chemical value chains, Scope 3 accounts for the largest share of carbon impact. Not because processes are inefficient, but because the molecules themselves are derived from fossil carbon. 

That underlying dependency is what initiatives such as Flue2Chem have begun to explore in practical terms. 

What Flue2Chem set out to understand

Flue2Chem was designed to examine whether captured industrial CO₂ emissions could become viable chemical feedstocks for ingredients used in consumer products within existing value chains. 

The collaboration brought together partners from foundation industries, such as paper and steel, where large-scale emissions originate, alongside organisations in the chemicals and consumer goods sectors, where carbon-based intermediates are transformed into everyday products. The objective was to test whether CO₂ captured from real industrial flue streams could be converted into useful platform chemicals, and whether those intermediates could realistically feed into established manufacturing routes. 

Technically, the findings were encouraging. Captured carbon can be converted into viable chemical building blocks via biological and chemical routes, including intermediates relevant to surfactant production. That alone is significant. It demonstrates that fossil carbon is not the only source of molecular carbon capable of supporting high-performance products. 

But the most valuable insights from Flue2Chem extend beyond laboratory feasibility. The project reinforced that creating an alternative carbon supply chain is as much about integration and scale as it is about chemistry. It also highlighted the potential value of more vertically integrated UK supply chains, where closer alignment between carbon capture, chemical manufacturing and end-product development could help strengthen resilience and reduce dependency on imported fossil-derived feedstocks. 

From technical possibility to practical preparedness

For organisations considering alternative feedstocks, the question is no longer simply whether conversion is possible. The more meaningful discussion is about readiness: how prepared is your organisation to evaluate and integrate alternative carbon pathways in a structured way? 

That readiness is not only shaped by technical capability and commercial viability, but also by the wider policy environment. While momentum around low-carbon manufacturing continues to build, current UK policy and market conditions can still present challenges for organisations seeking to transition towards fossil-free chemical pathways at scale. 

Based on the learnings from collaborative programmes such as Flue2Chem, there are five areas that merit careful consideration.

1. Compatibility with existing chemistry

Alternative carbon routes ultimately need to align with the performance expectations of your end products. Captured CO₂ must be converted through specific processes to generate usable intermediates, and those intermediates must meet strict purity and consistency requirements. 

Even small variations in feedstock characteristics can influence conversion efficiency, yields and downstream formulation behaviour. Early-stage laboratory work is an important starting point, but pilot-scale validation is typically where practical realities emerge. Understanding compatibility at this stage can prevent costly redesign further down the line. 

2. The full techno-economic landscape

It’s understandable to compare alternative carbon routes directly with established fossil pathways on unit cost. However, the economic case is rarely that simple. 

Long-term carbon pricing trajectories, regulatory developments, investor expectations and customer commitments all shape the commercial outlook. Scenario modelling can reveal inflexion points that aren’t immediately visible through short-term cost comparisons. Flue2Chem highlighted the importance of viewing alternative carbon pathways through a broader strategic lens rather than as isolated cost exercises. 

3. Supply chain integration

One of the clearest insights from Flue2Chem is that no single organisation can deliver feedstock transition alone. 

Carbon capture may sit with heavy industry. Chemical conversion may sit with specialised chemical producers. Formulation and brand integration sit elsewhere again. Aligning these components requires collaboration across sectors that do not traditionally operate in close coordination. 

Infrastructure, logistics, policy and regulatory alignment, and contractual structures all need to be considered alongside technical development. Building viable carbon value chains is therefore as much about partnership as it is about process innovation. 

4. Scale and reliability

Bench-scale feasibility provides confidence, but commercial impact depends on throughput and reliability. Captured carbon must be available in sufficient volumes, and conversion processes must operate consistently within industrial environments. 

Integrating new intermediates into existing manufacturing systems also requires careful evaluation of operational risk and capital expenditure. Embedding scale-up thinking early in the development process helps ensure that promising chemistry does not stall as it moves toward deployment.

5. Alignment with long-term portfolio strategy

Perhaps the most strategic question is how alternative carbon fits within your broader material roadmap. 

Is it being explored as a discrete innovation initiative, or as part of a coordinated approach to feedstock transition? Organisations that consider carbon alongside energy, circularity and supply resilience tend to be better positioned to adapt as expectations evolve. 

Treating feedstock decisions as long-term portfolio considerations enables more informed investment and partnership decisions. 

Why this conversation is accelerating

There’s a noticeable shift in how carbon is being discussed across industry. While compliance remains important, embedded carbon intensity is increasingly influencing procurement decisions, brand positioning and investor assessments. 

As Scope 3 reporting becomes more granular, feedstock choices are likely to receive greater scrutiny. In that context, reliance on fossil-derived intermediates represents not just an environmental consideration, but a strategic exposure. 

Flue2Chem provides a useful indicator of industry direction. It demonstrates that technically viable alternatives are emerging and that cross-sector collaboration can unlock new possibilities. The work also makes clear that success depends on early integration of scale, economics and partnership considerations. 

Turning insight into structured action

For companies evaluating fossil carbon alternatives, the immediate priority is rarely wholesale transformation. Instead, it is structured exploration. 

That may involve pilot-scale compatibility testing, integrated techno-economic modelling, engagement with potential upstream partners, assessment of regulatory pathways, or supply chain demonstration projects that help establish viable UK pathways for alternative carbon sources. As the sector evolves, greater collaboration across the value chain and more examples of vertically integrated approaches will also be key in strengthening long-term resilience and commercial confidence. 

It’s also important to recognise that adoption challenges don’t end at ingredient production. Even where alternative feedstocks produce chemically equivalent ingredients that can act as drop-in replacements, downstream formulation validation can still take significant time across multiple product formats and applications. Where ingredients are not directly equivalent, reformulation requirements become even more complex, creating a substantial need for high-throughput testing, optimisation and validation capabilities. 

The transition away from fossil carbon will take time. However, the organisations that begin asking the right questions now are more likely to shape, rather than respond to, the next phase of sustainable chemical development. 

If reducing fossil carbon dependency is part of your medium-term roadmap, collaborative evaluation and early-stage testing can provide the clarity needed to move from feasibility to confidence. Alongside technical support, we can also help connect organisations across emerging supply chains and collaborative programmes to accelerate progress. Speak to us today about de-risking this pathway.