Sugarcane-based ethanol producing power


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Brazil Sugarcane Ethanol powers dual-fuel GE LM6000 turbines at Juiz de Fora, blending biofuel with natural gas to cut NOx and CO2 emissions, boost energy security, and showcase aeroderivative flexibility in Minas Gerais.

 

A Closer Look

A renewable sugarcane biofuel for dual-fuel turbines, lowering emissions and enhancing reliability in Brazil.

  • GE LM6000 modified for ethanol dual-fuel operation
  • Cuts NOx and CO2; improves plant emissions profile
  • Enhances energy security and dispatch flexibility

 

As further evidence of their commitment to renewable energies, GE and Brazil’s federal energy company, Petrobras, celebrated the world’s first use of sugarcane-based ethanol in a gas turbine system to produce electricity on a full commercial scale. The operation, at the Juiz de Fora Power Plant, is a significant milestone for Brazil.

 

Ethanol derived from sugarcane bagasse in Brazil is one of the most efficient biofuels in terms of energy balance and carbon emissions. The benefits of this alternative fuel are substantial: it is a renewable energy source and its combustion reduces atmospheric emissions, especially NOX.

The Juiz de Fora Power Plant is a simple-cycle, natural gas plant with a total capacity of 87 megawatts, located in the south of Minas Gerais state, approximately 180 kilometers (110 miles) north of Rio de Janeiro. The plant has two GE LM6000 gas turbines using advanced turbine technology to cut fuel use, one of whose combustors has been modified by GE to enable the use of ethanol, making it dual-fuel (ethanol and natural gas). This enhances the plant’s energy security and reliability by providing a valuable alternative fuel source for the power plant that previously had only one available fuel.

As the world’s second largest producer of ethanol and the world’s largest exporter, Brazil will benefit from incorporating ethanol in power generation into its thermal generation profile because of the abundant fuel supply. The country’s 35-year, large-scale experience in ethanol use is based on efficient agricultural technology for sugarcane cultivation, producing 26.9 billion liters (or about 7.3 billion U.S. gallons) in 2008, according to data provided by the Federal Government.

Flexibility is a key characteristic of GE’s aeroderivative product portfolio. From supporting a wide variety of operating profiles to fast, easy, modular maintenance programs, GE’s aeroderivative gas turbines support the operating needs of its global customers. To better support a rising need for reduced environmental impact and improved plant economics, GE’s aeroderivative team is focused on developing alternative fuel solutions such as coke oven gas power that will further augment the portfolio’s existing performance flexibility.

“GE’s continued investment in research and development of aircraft engines and industrial gas turbines enables the LM aeroderivative gas turbines to lead in technology, performance and operational flexibility while providing value to the customer,” said Darryl L. Wilson, president and CEO — Aeroderivative Gas Turbines for GE Power & Water. “The LM series has the ability to operate with a variety of fuels including biomass cogeneration pathways and features advanced emission control technologies.”

There will be five months of demonstration runs to validate the use of ethanol as an alternative fuel, as well as to ensure that emissions are within the expected limits. GE is providing the conversion technology and its turbine supply capabilities for large projects, engineering and field support during conversion and commissioning.

“This kind of collaboration demonstrates the exciting developments that can be achieved to provide economic, environmental and local solutions for our customers,” said Wilson. “We want to be a leader when it comes to providing more efficient and reliable power plant operations for our customers and we’ll continue to pursue these types of collaborative opportunities to develop those solutions.”

 

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