Biomass Pyrolysis for Steel: 10% Coal Replacement Proven
EU-funded research proves biomass-derived biochar can replace up to 10% of fossil coal in steelmaking. Here's what procurement teams need to know.
Steel's Carbon Problem Has a Biomass Answer — And the Data Is In
Let's be direct: the steel industry is responsible for 7–8% of global CO₂ emissions, and the pressure to cut that number isn't going away. CBAM is live. Green steel premiums are real. And your competitors are already exploring alternatives to fossil coking coal.
Here's the good news: biomass pyrolysis for the steel industry has just cleared its most important technical hurdle. The EU-funded BioCoDe project has published kinetic characterization data proving that biomass-derived biochar can replace up to 10% of fossil carbon in cokemaking — using waste materials, existing infrastructure, and a process that's ready to scale now.
If you're sourcing carbon carriers for steel production, or advising a steelmaker on decarbonization pathways, this research changes the conversation.
Why This Research Is Different From the Usual Biochar Hype
We hear it all the time in this industry: "biochar is promising, but not ready for steel." That objection is getting harder to sustain.
The BioCoDe team didn't just run lab experiments and call it a day. They used thermogravimetric analysis (TGA) — a rigorous method that measures exactly how a material breaks down under heat — and applied the Coats–Redfern integral method to extract precise kinetic parameters for each feedstock tested.
In plain terms: they've mapped the math of how biomass turns into usable carbon carriers. That's the data you need to optimize a pyrolysis operation at industrial scale, not just at bench scale.
This is peer-reviewed, EU-backed, and published in Open Research Europe. It's not a white paper from a biochar vendor.
Five Feedstocks That Already Exist in Your Supply Chain
Here's where it gets practical. The researchers didn't test exotic or expensive biomass. They tested materials that are already considered waste streams in agriculture and industry:
| Feedstock | Where It Comes From |
|---|---|
| Olive branches | Agricultural pruning waste |
| Olive trunks | Orchard removal waste |
| Pine | Forestry residues |
| Pallet wood | Logistics and warehousing |
| Wooden crates | Distribution and retail waste |
These feedstocks are abundant, low-cost, and — critically — don't compete with food production. For anyone worried about the sustainability optics of biomass sourcing, residual and waste-stream feedstocks are exactly the right answer.
If you're a biochar producer, this is your feedstock shortlist. If you're a steel buyer, this is what you should be asking your suppliers about.
The Hemicellulose-to-Lignin Ratio: Your New Quality Benchmark
The study identified the hemicellulose-to-lignin ratio as the key variable that determines how a feedstock behaves during pyrolysis. This is genuinely useful intelligence for procurement.
Here's the practical takeaway:
- High-lignin feedstocks produce more thermally stable biochar — better suited for the demanding conditions inside a blast furnace
- High-hemicellulose feedstocks decompose at lower temperatures and release more volatiles, yielding lower-quality char for metallurgical use
- Knowing your feedstock's composition lets you predict output quality before you run a production batch
For buyers sourcing biomass carbon carriers, this means you should be asking suppliers for lignocellulosic composition data — not just carbon content. For producers, it means your feedstock selection strategy directly determines your product quality.
This is the kind of technical framework that separates serious players from opportunistic ones in this market.
10% Coal Substitution: Small Number, Big Impact
We know what you're thinking: 10% doesn't sound like much. But here's how to think about it.
Blast furnace cokemaking is one of the most tightly controlled industrial processes on the planet. Getting any new material accepted into that charge mix — let alone 10% — requires airtight technical justification. The BioCoDe kinetic data provides exactly that.
And 10% at scale is not a rounding error. For a European integrated steel plant consuming 500,000 tonnes of coking coal annually, a 10% biomass substitution means:
- 50,000 tonnes of fossil coal displaced per year
- Measurable Scope 1 CO₂ reductions, directly attributable and auditable
- Real CBAM cost mitigation as carbon prices climb
- A documented step toward green steel certification
The [link:biochar-marketplace] is seeing this demand accelerate — buyers want verified carbon carriers with the technical specs to back up substitution claims.
'Immediately Deployable' — We Need to Talk About That Phrase
The BioCoDe project describes biomass carbon carriers as an immediately deployable decarbonization strategy. That's a strong claim, and it's worth unpacking why it's justified.
Unlike hydrogen-based DRI or CCS, biomass pyrolysis:
- Works within existing infrastructure — pyrolysis units integrate alongside current cokemaking operations
- Doesn't require new blast furnace designs — biochar blends into existing coal charge mixes
- Uses available feedstock — waste biomass is already being collected and processed in Europe
You don't need to wait for a hydrogen economy or a carbon capture network. You need a reliable biochar supplier with the right specs, and you can start reducing your fossil coal dependency in the next procurement cycle.
That's what "immediately deployable" actually means for your operations.
What to Demand From Your Carbon Carrier Supplier
If you're taking this research seriously — and you should be — here's the sourcing checklist that follows directly from the BioCoDe findings:
- Feedstock origin and waste-stream verification (for sustainability credentials and CBAM documentation)
- Lignocellulosic composition data — hemicellulose, cellulose, and lignin percentages
- Pyrolysis temperature and process parameters — kinetic optimization matters for char quality
- Fixed carbon content and ash specification — the metallurgical performance benchmarks
- Carbon accounting documentation — sequestration value for ESG and regulatory reporting
If a supplier can't answer these questions, they're not operating at the level the steel industry requires.
The Bottom Line
The science has caught up with the ambition. Biomass pyrolysis for the steel industry is technically characterized, kinetically validated, and operationally feasible — right now, with waste feedstocks, inside existing infrastructure.
The BioCoDe project has done the hard academic work. The commercial challenge is sourcing verified suppliers who can deliver at scale.
That's exactly what we built BiocharLink for.
Explore verified biochar and metcoal suppliers on BiocharLink — and start building your biomass carbon carrier supply chain today.
Source: Aguilar-Mamani, W. et al. (2025). Open Research Europe. https://doi.org/10.12688/openreseurope.22185.1