The sustainable aviation fuel (SAF) story has always been one of constraints. Limited feedstocks, emerging technologies and policy-driven demand have all played a significant role in its development.
But in 2026, a new force is reshaping the equation: geopolitics. Specifically, the ripple effects of the Iran war has directly impacted global energy and trade flows.
What was already a tight system is now being stress-tested. And for aviation stakeholders, the implications go far beyond fuel prices. They strike at the very foundation of SAF: feedstock pathways.
SAF is generally seen as aviation’s most viable near-term decarbonization lever. It offers lifecycle emissions reductions of up to 60–90% and can be used as a drop-in fuel within existing infrastructure.
However, its scalability depends on something far less stable: the availability and integrity of feedstocks.
Today’s dominant pathway, HEFA (Hydroprocessed Esters and Fatty Acids), relies heavily on:
These inputs are not just limited; they are globally traded, policy-sensitive, and increasingly contested across sectors.
Even under optimistic assumptions, SAF production is expected to fall short of demand, leaving a structural gap as aviation targets ~500 million tons of fuel consumption by 2050.
In other words: the system was already tight before geopolitics entered the picture.
The Iran war has introduced a new layer of volatility into global energy systems. And that volatility is now spilling into biofuels.
Three key disruptions are emerging:
As traditional jet fuel markets face disruption through supply constraints, trade rerouting, and price volatility, regions like Europe are increasingly looking to secure alternative fuel sources. This also includes SAF.
Recent developments suggest that policymakers are exploring expanded imports (including from the US) to stabilize supply.
Implication: SAF is no longer just a decarbonization tool. It is becoming part of energy security strategy, accelerating demand faster than feedstock supply can respond.
The SAF ecosystem depends on highly globalized feedstock flows:
Geopolitical instability, particularly in energy corridors, reshapes shipping routes, trade costs, and availability.
Implication: feedstocks are being redirected, repriced, or stranded, creating regional imbalances:
This reinforces a core truth: feedstock geography plays an enormous role in how the SAF market functions.
As flows become more complex, so do concerns around:
In a tighter market, the incentive to stretch definitions or reinterpret pathways grows.
Implication: the definition of “sustainable” feedstocks is no longer static. It is being continuously renegotiated under policy, market pressure, and now geopolitical urgency.
Each SAF pathway responds differently to this new environment.
HEFA remains the dominant commercial pathway. But its reliance on finite waste oils caps its global potential at roughly 30–35 million tons annually.
With increased competition from renewable diesel and marine fuels, and now with energy security concerns, HEFA feedstocks will be the first to tighten.
ATJ offers a broader feedstock base (corn, sugarcane, residues), but lower conversion efficiency currently limits real output.
Nevertheless, in a geopolitically constrained environment, regions with strong agricultural systems (US, Brazil) gain strategic advantage.
Residue-based pathways (ag waste, forestry, MSW) offer scalability. But they require several factors for viability:
These pathways are less exposed to global oil shocks but more vulnerable to project financing and policy uncertainty.
Unlike biomass-based pathways, eSAF is not constrained by physical feedstocks. Instead, it depends on multiple factors:
This makes it uniquely attractive in a geopolitically fragmented world.
Implication: the Iran war and similar disruptions may accelerate the long-term shift toward eSAF. Particularly, this will occur in regions that offer:
Before 2026, SAF strategy was largely about optimization:
Now, it is increasingly about competition:
And underpinning all of this is a fundamental constraint. The same limited pool of sustainable inputs must now serve a growing number of decarbonization pathways under an increasingly unstable global state.
For stakeholders across the SAF value chain, three priorities are emerging:
Relying on a single feedstock or pathway is increasingly risky. The future lies in portfolio strategies across multiple inputs and technologies.
The global SAF market is fragmenting into regional ecosystems:
Understanding these dynamics is critical to navigating supply risk.
As feedstock flows shift and pathways evolve, visibility becomes essential:
In a market defined by uncertainty, clarity is the edge. Market intelligence from platforms like Prima CarbonZero help to shed light on this uncertainty with key biofuel and feedstock data alongside expert analysis.
The pathway from feedstock to fuel has never been simple. But it is becoming more complex and more consequential.
Geopolitical disruption is not just influencing SAF markets. It is reshaping them at the structural level, redefining:
The result is a market that is no longer just supply-constrained but strategically contested. And in that environment, success will depend on one thing above all: understanding the full system, from feedstock origin to final fuel, before the market moves.
Understanding how geopolitics, policy, and market dynamics intersect is only part of the equation. The real challenge and opportunity lies in tracing how feedstocks move through complex production pathways to become certified low-carbon fuels.
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