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Home / News / Brazil's largest gas-fired power plant starts operating in Rio de Janeiro

Brazil's largest gas-fired power plant starts operating in Rio de Janeiro

With an installed capacity of 1,7 GW, the plant received investments of R$7 billion and generated more than 10 thousand jobs
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  • Photo by Wagner Freire Wagner Freire
  • June 2, 2025, at 13:36 AM
1 min 11 sec read
Source: Illustrative image/Canva

UTE GNA II, the largest natural gas-powered thermoelectric plant in the country, officially began commercial operations last Friday (31), in Porto do Açu, in the state of Rio de Janeiro.

With an installed capacity of 1,7 GW, the plant received investments of R$7 billion and generated more than 10 thousand jobs, according to the ANEEL (National Electric Energy Agency). 

The plant has the capacity to supply around eight million homes and represents approximately 10% of natural gas energy generation in Brazil.

The plant operates in a combined cycle, with three gas turbines and one steam turbine, and stands out for its use of low environmental impact technology. 

According to ANEEL, UTE GNA II has the technical capacity to operate with up to 50% hydrogen in its fuel composition.

In addition to GNA II, the generation complex at Porto do Açu already has UTE GNA I, with 1,3 GW, and an LNG (liquefied natural gas) terminal, both in operation since 2021. 

With 3 GW of installed capacity, the Porto do Açu Complex is the largest in Latin America in its segment. 

If necessary, it can supply the consumption of up to 14 million homes or meet the energy demand of the states of Rio de Janeiro, Minas Gerais and Espírito Santo.

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thermoelectric generation
Photo by Wagner Freire
Wagner Freire
Wagner Freire is a journalist graduated from FMU. He worked as a reporter for Jornal da Energia, Canal Energy and Agência Estado. Covering the electricity sector since 2011. Has experience in covering events such as energy auctions, conventions, lectures, fairs, congresses and seminars.
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