Cardano Helps Brazil’s Oil Giant to Track Cleaner Fuel Claims
Petrobras has developed a research platform on Cardano to track sustainable aviation fuel claims, including who receives an environmental attribute and when it has been used.
The Cardano Foundation’s case study describes a collaboration involving Petrobras, PUC-Rio University’s Ledger Labs and the Foundation. Called CS-SAF, the platform represents fuel sustainability attributes as digital tokens with metadata aligned with the aviation emissions framework CORSIA.
Key Takeaways
- Petrobras developed the platform through a research collaboration.
- Fuel attributes can be allocated separately from supply.
- Certification remains essential to validating environmental claims.
Why fuel claims need a separate record
Under a book-and-claim model, a buyer can acquire the environmental attributes of sustainable aviation fuel without taking delivery of that fuel. The Roundtable on Sustainable Biomaterials explains that these attributes are transferred separately through a registry. This allows buyers to support sustainable fuel use even when they cannot access the physical supply.
Separating the claim from the delivery makes accurate accounting essential. The record needs to connect each attribute to the certified fuel, track its allocation and show when it has been claimed. Otherwise, participants may struggle to establish whether the same benefit has already been used.
The Foundation describes the following process for CS-SAF:
The case study also describes a dedicated app through which passengers can claim tokens and receive a certificate.
Petrobras already produces fuel that needs this accounting
Petrobras says its sustainable aviation fuel, produced at the Duque de Caxias refinery, has obtained CORSIA sustainability certification. Production involves co-processing conventional petroleum feedstocks with renewable material.
The company also produces R Diesel by co-processing petroleum diesel with inputs such as vegetable oil or animal fat. Petrobras markets versions with different renewable shares, including R5 at 5% and R10 at 10%.
Those percentages help explain why precise records matter. A fuel’s renewable content, its calculated lifecycle emissions and the benefit a buyer may report are different pieces of information. Buyers and auditors need to know exactly what a certificate covers.
Certification determines whether a claim is valid
For aviation claims, ICAO’s CORSIA framework requires eligible fuels to come from producers certified through an approved sustainability certification scheme. These checks establish whether the applicable sustainability criteria and lifecycle-emissions methodology have been met.
An auditable transaction history can help an auditor follow an attribute after issuance. Assessing its environmental value still requires evidence about the feedstock, production process and emissions calculation. Token retirement also needs safeguards against the same underlying benefit being issued again or claimed through another registry.
Fuel certification and acceptance of a digital record are separate questions. A certificate aligned with CORSIA requirements does not, by itself, establish that regulators accept a particular blockchain platform for reporting.
Commercial use remains the unanswered question
The Foundation’s public case study does not identify participating airline customers, quantify fuel volumes represented by the tokens or report how many claims have been retired. Those details would help establish the extent of operational use.
For Petrobras and its customers, the practical measure of success would be whether the system makes certificate reconciliation faster, gives auditors sufficient evidence and works with other registries. Documented results on those points would make the case for adopting it across the fuel supply chain.
This article is for informational purposes only and does not constitute investment, legal or environmental-compliance advice.
Kosta has reported on cryptocurrency markets and blockchain infrastructure since 2020, bringing over six years of hands-on experience in the crypto industry built through daily tracking of markets, trends, and emerging blockchain developments. Specializing in Bitcoin on-chain analysis, institutional ETF flows, and digital asset price action, his work at Coindoo has been cited by other news agencies and consistently covers market developments with a focus on data-driven reporting across Bitcoin, Ethereum, Solana, and XRP. Over the years, Kosta has contributed to multiple crypto media outlets in different regions, authoring over 6,000 articles across the sector. His reporting spans cryptocurrency markets and the broader fintech industry, tracking not only price action but also the technological and regulatory forces shaping the ecosystem. To support his analysis, Kosta actively leverages on-chain data and metrics from leading platforms such as Santiment, Glassnode, and CryptoQuant, enabling deeper, evidence-based market insights. He believes in the power of transparency and the data that underpins the blockchain ecosystem. His academic background in Marketing Management from Denmark further complements his analytical approach, adding a strong understanding of communication strategy and content positioning to his work.
