Brazil is set to inaugurate its first dedicated biorefinery this year, marking a paradigm shift in the country’s energy transition as state-run oil giant Petrobras (PETR4.SA) scales up its proprietary "Diesel R" technology.
The project involves transforming the historic Rio Grande Refinery (Refinaria Riograndense), built in 1937, into a 100% renewable fuel facility. The move, revealed by former Petrobras CEO Jean Paul Prates in a recent interview, aims to repurpose older, less competitive infrastructure into a cornerstone of Brazil’s green economy.
THE "DIESEL R" ADVANTAGE
Unlike traditional biodiesel (fatty acid methyl esters), which is blended into fossil diesel at the pump, Petrobras’ "Diesel R" is produced by co-processing vegetable oils — such as soybean, rice, or corn — directly within the refinery’s hydrotreatment units.
"This is not biodiesel. It is pure, clean diesel produced from vegetable oil," Prates said. "The resulting product is chemically identical to fossil diesel, requiring carbon dating tests to distinguish between the two."
The technology offers several logistical and mechanical advantages:
- No Engine Modifications: "Diesel R" meets the highest standards for modern engines and exhaust systems without requiring changes to vehicle hardware or storage infrastructure.
- High Stability: The fuel is characterized by low contaminants and high stability, reducing engine failure risks and maintenance costs.
- Flexible Feedstock: Refineries can process varying percentages of vegetable oil (R5, R10, R15) alongside crude oil, or move to 100% renewable feedstock as seen in the Rio Grande project.
STRATEGIC TRANSITION
The initiative aligns with the "Fuel of the Future" law and the ANP (National Petroleum Agency) Resolution 968 of 2024, which created the "Diesel C" category for fuels with renewable content.
Prates emphasized that while total electrification is the ultimate goal for the 21st century, biofuels provide a critical 40-to-50-year bridge for countries like Brazil, which possess abundant land and agricultural frontiers that do not compete with food production.
DECARBONIZING THE PRE-SALT
Beyond biofuels, Petrobras is leveraging proprietary technologies like Ricep (Remote Interception for Controlled Evacuation Process) to lead global subsea carbon capture efforts. The company is currently reinjecting CO2 directly into offshore reservoirs 3 kilometers below the seabed, bypassing the need to bring the gas to the surface for processing.
"Petrobras has the largest subsea CO2 reinjection program in the world, by far," Prates noted, highlighting the company’s focus on maintaining its technological edge to avoid becoming a mere exporter of energy commodities.
POLITICAL CONTEXT
The technological push comes amid a polarized political climate in Brazil. Prates warned that the 2026 presidential cycle is already being "polluted" by misinformation and personal scandals, which often overshadow critical debates on public services, energy policy, and economic development.
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