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Yes. Biomass can be converted into sustainable aviation fuel (SAF), but no single feedstock or process makes every resulting fuel ready for aircraft. A viable route must turn an available biomass resource into a fuel that meets aviation specifications, demonstrate its life-cycle greenhouse-gas performance, and secure a dependable supply at a competitive cost.
How does biomass become jet fuel?
The process is a chain, not a direct transformation from plant material to fuel. The feedstock is collected and prepared, converted into an intermediate, upgraded into a jet-fuel blend component, qualified against fuel specifications, and then blended and distributed for use. The steps and compatible feedstocks depend on the pathway.
- Select and collect a feedstock. Potential resources include agricultural and forestry residues, wood-mill waste, municipal solid waste, wet wastes, fats, oils and greases, oil seeds, corn grain, algae, and dedicated energy crops. Their suitability depends on the conversion route, collection logistics, competing uses, and sustainability constraints.
- Prepare and convert it. Processing creates an intermediate suitable for further conversion. In alcohol-to-jet (ATJ), for example, biomass-derived alcohols such as ethanol or isobutanol can be used; ICAO also lists an ATJ route involving isobutene. Other pathways, including Fischer–Tropsch (FT), are included in ICAO’s conversion-process materials.
- Upgrade and qualify the fuel. The converted material must meet the relevant aviation-fuel specification and be tested and approved for its intended use. A fuel made in a laboratory or demonstration process is not automatically approved for aircraft.
- Blend and distribute it. Approved SAF pathways have applicable blend limits. The blend is handled within aviation’s existing fuel and infrastructure system according to the relevant requirements; “drop-in” does not mean every experimental product can be used neat or without qualification.
ICAO defines a conversion process as “a type of technology used to convert a feedstock into aviation fuel.” Its conversion-process page lists approved pathways and blend limits, alongside processes under evaluation. Approval status and allowable blends can change, so the current ICAO table—not a general label such as “biojet”—is the right reference for a specific route.
Which biomass-to-jet pathways are relevant?
ATJ and FT are examples, not interchangeable recipes. The available information establishes that ICAO lists both among aviation-fuel conversion pathways, but it does not provide a comparable, current dataset of their yields, costs, or project performance. The table distinguishes what can be stated from what cannot be inferred.
#1 Best Overall
| Pathway | What is established | What must be checked for a specific project |
|---|---|---|
| Alcohol-to-jet (ATJ) | ICAO lists ATJ synthetic paraffinic kerosene routes using alcohols such as ethanol and isobutanol, and a route involving isobutene from biomass. | The feedstock-to-intermediate chain, current approval status, applicable blend limit, fuel specification, and project-specific economics and emissions. |
| Fischer–Tropsch (FT) | ICAO lists FT among the conversion pathways. | The particular feedstock and process configuration, current approval status, applicable blend limit, and comparable project-specific yield, cost, and emissions data. |
ICAO reported that, as of July 2023, 11 conversion processes had been approved and 11 others were under evaluation. That is a dated count, not a current tally. The organization also describes ongoing work on 100% SAF use and higher co-processing limits; it should not be read as blanket approval for all SAF pathways to be used at 100%.
Is biomass-derived jet fuel lower-carbon?
It can have a lower life-cycle greenhouse-gas intensity than fossil jet fuel, but “bio-based” does not by itself prove a climate benefit. Aviation fuel still releases carbon dioxide when burned. The relevant comparison is the full life-cycle result, commonly expressed in grams of CO2-equivalent per megajoule, rather than the feedstock’s biological origin alone.
ICAO’s CORSIA accounting covers feedstock cultivation or recovery, processing and extraction, transport, conversion, fuel distribution, and combustion. It also addresses indirect land-use change and, for eligible municipal-solid-waste fuels, certain optional credits. These elements can materially affect the reported result.
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Default values and actual values
ICAO’s methodology allows default life-cycle values or actual values supported by appropriate technical information. A producer using actual values needs traceable evidence for the pathway and its inputs; an unsupported claim about a particular facility or feedstock is not enough to establish its emissions intensity. When comparing fuels, check both the reported value and whether it is based on a default or substantiated actual data.
Why is scaling biomass-to-jet difficult?
Feedstock supply is not the same as usable supply
The U.S. Department of Energy’s summary of the 2023 Billion-Ton Report says U.S. biomass production could exceed 1 billion tons per year and estimates potential output of 60 billion gallons of liquid biofuels. These are broad national biomass and biofuel estimates, not a forecast of SAF production. They do not establish how much biomass aviation can obtain after competing uses, collection limits, conversion yields, and sustainability constraints are considered.
Fuel qualification and infrastructure matter
A route must meet the applicable fuel specification and be approved for the intended blend. Feedstock and process combinations vary, so approval for one route cannot be assumed to cover another. Qualification, blending limits, and distribution requirements form part of the path from a promising conversion process to fuel that can be supplied for aircraft use.
Cost and demand remain barriers
On 13 November 2024, DOE reported that SAF cost two to ten times as much as fossil jet fuel, depending on feedstock and conversion technology. This is a dated reported range, not a current quote or a price for any one pathway. DOE identifies policy support and long-term offtake agreements as factors that can help provide demand certainty and support project financing.
What would make one pathway a better choice?
There is no universal winner established by the available comparable data. A decision about a plant or fuel supply needs a location-specific assessment of the entire chain, not just a comparison of conversion technology names.
Best Value
- Feedstock: type, sustainable availability, collection distance, seasonality, and competing uses.
- Fuel qualification: the pathway’s current approval status, relevant specification, and permitted blend.
- Project performance: fuel yield, capital and operating needs, and feedstock cost, using comparable and reliable data.
- Climate evidence: life-cycle intensity, land-use effects, and the documentation needed to support actual values.
- Route to market: project location, policy eligibility, incentives, distribution arrangements, and offtake commitments.
Without comparable, current route-by-route cost and yield data, ranking ATJ against FT on economics or efficiency would overstate what is established.
What is the U.S. doing to support SAF?
The U.S. SAF Initiative brings DOE, the Department of Transportation, the Department of Agriculture, and other federal agencies together to develop a strategy for commercial-scale production. DOE describes work to de-risk technology, supply chains, and markets through demonstration, funding, and policy analysis, while addressing distribution and end-use barriers. These goals support scale-up; they do not mean that any particular biomass pathway has already achieved commercial viability.
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