Biomass to SAF
Biomass to SAF is a sustainable aviation fuel pathway that converts biological carbon from plant-based materials into synthesis gas and then into aviation fuel through Fischer-Tropsch synthesis.
Depending on feedstock type and project design, biomass may be converted directly through gasification or first processed biologically to generate biogas that is later reformed into synthesis gas.
The Toyo project demonstrates how biomass can support syngas-based SAF production at industrial scale.
Project at a glance
- Pathway: biomass to SAF
- Feedstock: woody biomass and forestry residues
- Conversion route: gasification → syngas → Fischer-Tropsch synthesis
- Products: sustainable aviation fuel and renewable fuel fractions
- Project focus: biomass-based SAF development through integrated syngas conversion
What is biomass to SAF?
Biomass to SAF begins by converting solid biological feedstocks into synthesis gas through either thermochemical or biological conversion pathways.
The process typically follows one of two routes:
Thermochemical route
- Biomass preparation
- Gasification into synthesis gas
- Gas cleaning
- Fischer-Tropsch synthesis
- Fuel upgrading
Biological route
- Biomass digestion into biogas
- Reforming into synthesis gas
- Fischer-Tropsch synthesis
- Fuel upgrading
Both routes create synthesis gas as the intermediate for hydrocarbon production.
What feedstocks are used in biomass to SAF?
Biomass to SAF projects typically use lignocellulosic feedstocks rather than oils or methane.
Common biomass sources include:
- forestry residues
- wood waste
- agricultural residues
- sawmill byproducts
These materials contain carbon that can be converted into syngas through thermal or digestive processing.
Why is biomass attractive for sustainable aviation fuel production?
Biomass offers a renewable carbon source that can support large-scale fuel production where sustainable feedstock supply exists.
Because biomass can follow multiple conversion routes, projects can be designed around feedstock characteristics rather than one fixed process model.
Advantages include:
- broad regional availability
- compatibility with gasification and anaerobic digestor systems
- renewable carbon origin
Biomass is widely distributed. Project viability often depends on local logistics and long-term supply agreements.
How does biomass become aviation fuel?
Biomass can reach aviation fuel through more than one syngas-generation route depending on feedstock composition.
Gasification route
Dry biomass is converted directly into hydrogen and carbon monoxide through thermal gasification.
Digestion + reforming route
Wet or biologically suitable biomass can first generate biogas through anaerobic digestion.
That biogas is then reformed into synthesis gas.
Some reforming systems can process methane and carbon dioxide together without separating methane first.
This allows raw biogas streams to enter syngas production directly.
The resulting syngas from gasification and digestion + reforming then enters Fischer-Tropsch synthesis.
See:
What is the Toyo biomass to SAF project?
The Toyo/NEDO project is a biomass-to-SAF development that used woody biomass feedstock in a syngas-based fuel pathway.
The project combined:
- biomass gasification
- syngas conditioning
- Fischer-Tropsch synthesis
- fuel upgrading into aviation fuel fractions
It demonstrated how biological carbon can enter SAF production through a thermochemical route.
Why the Toyo biomass to SAF project mattered.
How is biomass to SAF different from other SAF pathways?
Biomass to SAF uses solid plant-derived feedstocks rather than oils, municipal waste, or renewable natural gas.
Compared with other pathways:
- NovaSAF 1 uses raw biogas (methane and carbon dioxide)
- Altalto uses municipal solid waste
- HEFA uses lipid feedstocks
Biomass projects depend heavily on solid feedstock logistics and gasification / reforming performance.
Velocys’ earlier GTL deployment at Envia [link to Gas to liquids plant page] demonstrated modular Fischer-Tropsch operation under commercial conditions, providing operating experience that informs later SAF pathways.
Why does biomass matter in SAF scaling?
Biomass provides one of the largest potential renewable carbon sources for long-term SAF production.
Because aviation fuel demand is large, biomass is often discussed as a major future feedstock where sustainable harvesting is possible.
What role does Fischer-Tropsch play in biomass to SAF?
Fischer-Tropsch synthesis converts cleaned biomass-derived syngas into liquid hydrocarbons suitable for fuel upgrading.
This step creates synthetic fuel intermediates later refined into SAF.
What challenges affect biomass to SAF projects?
Biomass projects depend on feedstock consistency, logistics, and reformer / gasification performance.
Key considerations include:
- feedstock moisture
- transport radius
- gas cleanup quality
- long-term biomass supply contracts
These factors strongly influence project economics.
Frequently asked questions
Can wood really become aviation fuel?
Yes. Woody biomass can be gasified into synthesis gas and converted into hydrocarbons. Velocys and Toyo proved out the pathway in the NEDO biomass to SAF project in Japan.
Does biomass always need to be gasified to make SAF?
No. Some biomass pathways first produce biogas through digestion before reforming into synthesis gas. This is the pathway being used in the NovaSAF 1 biogas to SAF project in Uruguay.
Does biomass to SAF use Fischer-Tropsch synthesis?
Yes. Fischer-Tropsch is the hydrocarbon synthesis step in syngas-based biomass pathways.
Is biomass considered renewable carbon?
When sourced sustainably, biomass is treated as renewable biological carbon.