Chinese removal,priced worldwide.
We develop biochar removal projects and issue and trade credits on Carbonfuture, Isometric and Puro.earth, so every tonne removed in Chinese fields becomes an asset recognised worldwide.
Placement · Anhui farmland
- Feedstock
- Rice straw
- Batch
- Plant · lab · field
- Status
- Verified · issued
(01) The product
One credit is one tonne of CO₂ 
taken out of the air and stored in farmland soil, with the batch 
, the lab result 
and the field on record.
Buyers of carbon removal are no longer satisfied with a certificate alone. They want to know where the carbon came from, how it was measured and who checked it. Our credits are built for that question.
Each credit starts as crop residue from Chinese farms. It is converted into biochar at an industrial plant, tested in an accredited laboratory and placed in farmland or fertilizer blends. The full record is reviewed by an independent verifier before the registry issues serialized credits. We sell those credits directly to companies and through the marketplaces our buyers already use.
- Credit type
- Durable carbon removal · biochar
- Feedstock
- Agricultural residues: rice, wheat and corn straw
- Origin
- Anhui and Zhejiang provinces, China
- End use
- Farmland application and biochar fertilizer blends
- Registries
- Puro.earth · Isometric · Carbonfuture
- Verification
- Independent, registry-approved bodies
- Volume
- 25,000 credits planned for 2027
- Pricing
- On request, in line with the biochar market
(02) The market
Demand beats good supply.
Biochar carries most of the durable removal delivered so far. Large buyers are locking in multi-year volumes, and new projects that pass serious vetting are rare.
Unique companies that have bought biochar credits.
Share of high-quality supply already under contract.
Sources: CDR.fyi (2025) · Supercritical market analysis (2026)
(03) Quality criteria
Five tests. No shortcuts.
Five tests stand between a batch of biochar and a credit with our name on it.
Eligible feedstock
Only agricultural residues that would otherwise decay or be burned. No wood from forests and no crops grown for the purpose.
Stable carbon
Every batch is tested for organic carbon content and H/Corg ratio, and must meet the registry's stability limit.
Clean material
Heavy metals and other contaminants are tested against agricultural limits before biochar may enter any field.
Net of emissions
Transport, processing and spreading emissions are subtracted, so the credit counts only the net removal.
One claim only
Supply contracts rule out any second claim on the same removal, inside or outside China.
(04) Who we work with
Built for buyers who read the fine print.
Net-zero programmes
Companies with science-based targets that need durable removals for residual emissions, and a record they can show to auditors.
Intermediaries and marketplaces
Portfolio builders and platforms that need new, vetted supply with complete documentation for their own diligence.
Multi-year offtake
Buyers who want a fixed allocation over several years, delivered as batches are verified and issued.
Supply-chain partners
Companies with sourcing or operations in China that want removal tied to the regions they already work in.
(05) How reservation works
Email to certificate.
Enquiry
Tell us the volume, delivery year and how the credits will be used.
Diligence pack
Supplier profile, methodology, lab protocol, verifier details and a contract template.
Reservation letter
Your allocation confirmed in writing, backed by matched biochar procurement.
Delivery
Credits delivered after issuance on the registry, batch by batch.
Retirement
Credits retired in your name, with the certificate and the batches behind it.
(06) Buyer questions
Before you reserve.
China has one of the largest crop-residue streams in the world and a fast-growing biochar industry. Kepler connects that supply with European standards of documentation and with buyers who need traceable volume.
Removal credits support claims about your own residual emissions. EU rules restrict generic environmental claims to consumers, so we help buyers phrase claims around the specific tonnes they retired.
We work with allocations of any size. Larger multi-year agreements receive priority access to early batches.
In line with the international biochar removal market, depending on volume, delivery year and contract length. We share pricing with the diligence pack.