Brazil’s state-controlled energy giant Petrobras is collaborating with the Cardano Foundation and PUC-Rio University’s Ledger Labs to build blockchain applications that track renewable fuels and prevent carbon double-counting. Announced on Sept. 30, the research and development initiative focuses on sustainable aviation fuel (SAF) and Diesel R, Petrobras' proprietary renewable fuel brand.
Key Takeaways
- Petrobras is testing Cardano to mint and retire CS-SAF tokens representing renewable aviation fuel benefits.
- The platform utilizes a Book-and-Claim model matching CORSIA international aviation standards to prevent double-claiming.
- A secondary pilot tracks Diesel R across supply chain checkpoints to support corporate Scope 3 emissions disclosures.
Standardizing Environmental Attributes on Cardano
The SAF project targets a key accounting challenge where the buyer of a fuel's environmental benefit differs from the consumer of the physical fuel. Developed alongside PUC-Rio University's Ledger Labs, the system converts environmental attributes into standardized CS-SAF tokens on the Cardano blockchain.
These CS-SAF tokens can be minted, transferred, verified, and retired on-chain. Token retirement permanently locks the asset, preventing the same environmental benefit from being claimed twice—mirroring how blockchains solve the double-spending problem. Passengers and airlines can enter route details, calculate their CS-SAF allocation, and receive a digital certificate connected to the original fuel documentation. Token metadata aligns with CORSIA (Carbon Offsetting and Reduction Scheme for International Aviation) guidelines.
This pilot deepens blockchain integration within South American energy infrastructure, expanding on trends where Ripple and Cardano expand in Brazil with CSD BR and Petrobras partnerships. According to June 16 guidance from the Roundtable on Sustainable Biomaterials, Book-and-Claim frameworks do not alter physical fuel delivery but require companies to disclose environmental claims separately from operational emissions.
Diesel R and Scope 3 Emissions Tracking
Beyond aviation, Petrobras and PUC-Rio designed a secondary architecture for Diesel R, Petrobras' renewable diesel brand. The platform logs tracking checkpoints across production, transport, and consumption to build a permanent fuel lifecycle record.
This verifiable trail is structured to support Scope 3 reporting, which tracks indirect emissions across an enterprise's broader supply chain. However, the Cardano Foundation stated that commercial transaction volumes and revenue figures remain unquantified while the projects operate as research and development models.
Why It Matters
This collaboration demonstrates how public blockchains can address real-world carbon accounting challenges through token burning and immutable metadata. By applying cryptocurrency's anti-double-spending mechanics to environmental certificates, Cardano establishes enterprise credibility within heavily regulated energy sector supply chains. The project's ultimate success will depend on whether Petrobras transitions these R&D pilots into full-scale commercial operations.
