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 sustainabil
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.
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:
How a fuel attribute moves through CS-SAF 1. Validate and issueCertificates are checked against recognised standards before their attributes are represented as tokens. 2. AllocateTokens are assigned to airlines or passenger journeys using emissions calculations. 3. RetireClaimed tokens are permanently retired on-chain, preventing their reuse within the system.The case study also describes a dedicated app through which passengers can claim tokens and receive a certificate.
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.
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.
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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.
The post Cardano Helps Brazil’s Oil Giant to Track Cleaner Fuel Claims appeared first on Coindoo.
