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Self-reliant plants key for Brazil's RNG mandate

  • Spanish Market: Emissions, Natural gas
  • 09/06/25

Brazil's self-sufficient biomethane producers could play a key role in meeting an emissions mandate set for next year.

While most of Brazil's renewable natural gas (RNG) supply is tied up in long-term contracts, self-sufficient plants — those that produce RNG for their own consumption — may help fill the gap by generating and selling biomethane origin guarantee certificates (CGOBs) without changing how they use the fuel.

Market participants are concerned about the amount of biomethane available to meet the mandate to reduce carbon emissions from natural gas by 1pc starting in 2026, as most plants have long-term contracts for almost all their supply.

But self-sufficient plants could sell CGOBs while still using the fuel for their production, market participants said. Such plants represent 24 of the 54 operational RNG production plants in Brazil, with another 10 under development, according to the latest data from Brazil's international center for renewable energies CiBiogas. These are industrial, agro-industrial, sugar and ethanol, beverage and food companies, which use biomethane as a substitute for natural gas or other fuels like diesel and firewood, according to CiBiogas market intelligence manager Nicolas Lazzaretti Berhorst. Hydrocarbons regulator ANP lists only 12 authorized biomethane plants.

But under current emissions mandate regulation discussions, self-sufficient plants would have a long path ahead to be recognized by ANP before being eligible to generate CGOBs. Many factors could influence how long that takes, the regulator told Argus, including how fast they answer ANP's questions."

After getting approval to produce biomethane, generating CGOBs will also require hiring an origin certification agent, a financial market registrar and a registration platform recognized by securities regulator CVM, as well as transparency about volumes and prices.

The biggest risk from self-sufficient plants' playing a role in the mandate would be unwillingness to relinquish the environmental attribute after investing in the production of biomethane, according to Berhorst. "Obtaining the certification to issue CGOBs has a cost," he said. "Whether this will be worth it or not will depend on the price of this new certificate."


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