Marlim Azul power station — Brazil

Marlim Azul power station is a 565 MW gas power station in Rio de Janeiro, Brazil. It is operated by Arke Energia SA. Based on its capacity (estimated), it can supply roughly 636k homes (estimated). It ranks #90 of 2,572 Brazil power plants by installed capacity. Commissioned in 2023, it is around 3 years old — recently built. Its modelled annual emissions are 686,230 t CO₂/yr (Climate TRACE), equivalent to about 160k cars driven for a year. In context, gas supplies about 7.3% of Brazil's electricity; the national grid averages 110 gCO₂/kWh (88.7% low-carbon) (2025).

Plant data: WRI Global Power Plant Database (CC BY 4.0), id CT-5515.

Data provenance

Source of the capacity and fuel values:

capacity: GEM · 2026 · L100000406512; fuel: Climate TRACE

In context: how this plant compares

At 565 MW, Marlim Azul power station is well above the median gas plant in Brazil (100.2 MW). Gas plants burn natural gas either in open-cycle turbines for fast peaking, or in combined-cycle units that recover exhaust heat in an HRSG to reach roughly 55–62% efficiency — the cleanest-burning fossil option.

Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.

~686,230 t CO₂/yr (modelled) — in everyday terms

This facility's annual emissions are roughly equivalent to:

Equivalencies via US EPA Greenhouse Gas Equivalencies; modelled emissions from Climate TRACE.

Key facts

Share of Brazil gas capacity

0.8% of 74,861 MW across 195 plants in this dataset

Age among peers

128 of 140 dated gas plants in Brazil are older

Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).

Capacity vs largest gas plants in Brazil

Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).

Owner

Operated by Arke Energia SA.

Local climate & thermal context

This gas plant burns natural gas in a turbine — often in a combined-cycle setup — to generate electricity. It sits in a tropical savanna climate (Köppen Aw) — Southern Hemisphere, latitude 22.4°S — which shapes how much energy it can produce and how its output varies through the year.

Monthly mean temperature

This site has effectively no heating season (tropical/equatorial climate), so winter heat loss is not the driver here. The thermal concern shifts to year-round process heat and humidity/heat-driven corrosion of hot equipment.

A gas turbine here also runs ~6% below its ISO (15°C) rating at this annual mean (typical CCGT curve, estimate).

Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.

Site climate & environmental severity

This site sits in an extreme marine/tropical environment (estimated ISO 9223 class CX — Extreme), with marine salt corrosion the leading environmental stress.

Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.

How it compares & nearby plants

The #44 largest gas power plant of 195 in Brazil by capacity.

Brazil has 195 gas power plants in this dataset, together about 74,861 MW of capacity.

Nearby power plants

• Norte Fluminense 2 power station · Gas · 1,713 MW · Rio de Janeiro
• MARIO LAGO · Gas · 922 MW · Rio de Janeiro
• Norte Fluminense · Gas · 868.9 MW · Rio de Janeiro
• Plaza Macaé · Oil · 1.2 MW · Rio de Janeiro
• Jaci power station · Gas · 667 MW · Rio de Janeiro
• Tupã power station · Gas · 2,040 MW · Rio de Janeiro

Location

Coordinates -22.3619, -41.8696 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions