Petrobras tests Cardano to track lower-carbon fuel claims

Petrobras, Brazil's state-controlled energy company, is testing the Cardano blockchain to track claims about lower-carbon fuel. The Cardano Foundation announced the two research projects Wednesday. One project covers sustainable aviation fuel, a lower-carbon alternative to conventional jet fuel that can be used in existing aircraft and airports. The other covers Diesel R, a diesel Petrobras makes partly from renewable materials such as vegetable oils or animal fats. Both projects remain in the research stage, with no disclosed timeline for broader deployment or details about the fuel volumes covered. The aviation project addresses the book-and-claim model, under which an airline can pay for the environmental benefit of sustainable fuel even if the fuel is used elsewhere. Cardano Foundation chief executive Frederik Gregaard said Petrobras continues to see value in tracking the origin and movement of products on a blockchain. Gregaard said institutional interest in Cardano is growing, citing the arrival of x402 on Cardano and Fireblocks adding support for Cardano Native Tokens.