Petrobras Picks Cardano to Prevent Double-Counting
Petrobras announced two blockchain pilots with the Cardano Foundation on September 30. The technology does not track fuel. It tracks the environmental claims attached to the fuel.
That distinction matters. Under book-and-claim models, the environmental benefit of using sustainable aviation fuel can be separated from the physical fuel itself and sold or transferred independently. An airline might buy conventional jet fuel in one location while purchasing the environmental credit from SAF burned elsewhere. The credit becomes portable.
The problem: once the claim moves separately from the fuel, it can be counted twice. The fuel producer claims it. The airline buying the credit claims it. Both appear in separate sustainability reports. Blockchain prevents that by recording who owns the claim and whether it has been retired.
Two separate pilots with different mechanics
The first pilot covers sustainable aviation fuel. Petrobras developed the system with PUC-Rio's Ledger Labs research center. Cardano creates CS-SAF tokens representing the environmental benefits of verified SAF production. Airlines, companies, or individual passengers can be assigned these tokens.
A passenger enters their departure and arrival airports. The system calculates the SAF allocation for that route and issues a certificate tied to the original fuel certificate on-chain. Once retired, the environmental benefit cannot be claimed again.
The second pilot tracks Diesel R, Petrobras' renewable diesel brand, across production, transportation, and consumption. Each stage generates a digital checkpoint. Cardano converts these checkpoints into a continuous lifecycle record. Companies use this for Scope 3 emissions reporting, which covers indirect emissions from suppliers and customers.
Rafael Fraga, Cardano's LATAM business development lead, said the energy transition would depend as much on trust as new fuels. He pointed to public blockchain as a way to build trust into the system by design.
Still research, no commercial deployment announced
Both projects remain in research phase. Neither Petrobras nor the Cardano Foundation disclosed a timeline for commercial deployment or the fuel volumes these systems would cover at scale.
Brazil's oil and gas market is projected to reach $28.82 billion by 2031. Petrobras has been testing SAF production since earlier this year. The blockchain pilots add verification infrastructure to fuel already being developed. Cardano recently cleared a governance vote for its Dijkstra upgrade by a narrow margin.
Cardano has landed multiple enterprise pilots in Brazil. SERPRO, the government technology agency, and SENAI, an industry training body, both run Cardano-based systems. The foundation's CEO Frederik Gregaard described Brazil as one of Cardano's most consistent adopters, joining other enterprise blockchain deployments across Latin America.
The CS-SAF token model does not change how fuel is produced or distributed. It changes who can claim credit for using it, and how many times that credit can be counted.