Florida goes green: PEF to buy all electricity from second, 75MW biomass plant
Progress Energy Florida (PEF) announces it has signed another contract with Biomass Gas & Electric LLC (BG&E) to purchase the electricity from a second waste-wood biomass plant planned for Florida.
BG&E, based in Atlanta, Ga., plans to build a power plant in north or Central Florida that will use waste wood products - such as yard trimmings, tree bark and wood knots from paper mills - to generate electricity. It would produce around 75 megawatts, or enough electricity to power 46,000 homes. The plant is expected to avoid the need to burn nearly 5 million tons of coal over the 20-year life of the contract. It would be identical to BG&E's waste-wood plant announced in July. Progress Energy Florida agreed to buy the output of that plant as well (previous post).
The green energy plant will use a gasification process to turn biomass into an easily combustible, hydrogen rich syngas. To do so, BG&E's waste-wood plant relies on the SilvaGas process developed by Future Energy Resources Corporation. Historically, biomass gasification technologies have been based on coal gasification designs. Those conventional combustion technologies do not take advantage of the high chemical reactivity of biomass, wasting energy and leaving behind residue typically generated through a burning process.
The SilvaGas process focuses on advanced gasification technologies specifically designed to gasify biomass and utilize the high chemical reactivity of the biomass feedstock. These processes typically feature a compact plant footprint and are not an incineration or combustion processes. Including the elimination of net CO2 additions to the environment, these advanced processes reduce the environmental impact of power generation by 90% compared to typical fossil fuel based power plants.
The process consists of the following steps (diagram, click to enlarge):
energy :: sustainability :: bioenergy :: biofuels :: renewable :: emissions :: electricity :: biomass :: gasification :: Florida ::
The contract will be filed for consideration with the Florida Public Service Commission (PSC). The company seeks PSC approval of the contract and certification of the proposed plant as a qualifying facility under Florida laws and regulations that encourage renewable energy.
In the past two years, Progress Energy has signed contracts to add nearly 300 megawatts of renewable energy to its system - which is enough to power 170,000 homes. In July, the company issued a request for renewables in an effort to continue to expand its alternative-energy portfolio.
In May 2006, Progress Energy signed a contract to purchase the energy output (130 MW) from the nation's largest biomass plant to be built in Central Florida. The project, which will utilize an environmentally friendly, dedicated energy crop known as 'E-grass' (Miscanthus x giganteus) as its fuel source, will reduce carbon emissions by more than 20 million tons over the 25-year life of the contract when compared to coal (earlier post) .
PEF purchases more than 800 megawatts from a number of qualifying facilities. They use various fuel sources, including biomass, waste heat from agricultural processes and municipal solid waste.
Progress Energy Florida is a subsidiary of Progress Energy, and provides electricity and related services to nearly 1.7 million customers in Florida.
References:
Progress Energy Florida: Progress Energy Florida signs contract for second waste-wood plant - December 18, 2007.
Biopact: Progress Energy Florida to buy electricity from largest biomass gasification plant - July 27, 2007
BG&E, based in Atlanta, Ga., plans to build a power plant in north or Central Florida that will use waste wood products - such as yard trimmings, tree bark and wood knots from paper mills - to generate electricity. It would produce around 75 megawatts, or enough electricity to power 46,000 homes. The plant is expected to avoid the need to burn nearly 5 million tons of coal over the 20-year life of the contract. It would be identical to BG&E's waste-wood plant announced in July. Progress Energy Florida agreed to buy the output of that plant as well (previous post).
The green energy plant will use a gasification process to turn biomass into an easily combustible, hydrogen rich syngas. To do so, BG&E's waste-wood plant relies on the SilvaGas process developed by Future Energy Resources Corporation. Historically, biomass gasification technologies have been based on coal gasification designs. Those conventional combustion technologies do not take advantage of the high chemical reactivity of biomass, wasting energy and leaving behind residue typically generated through a burning process.
The SilvaGas process focuses on advanced gasification technologies specifically designed to gasify biomass and utilize the high chemical reactivity of the biomass feedstock. These processes typically feature a compact plant footprint and are not an incineration or combustion processes. Including the elimination of net CO2 additions to the environment, these advanced processes reduce the environmental impact of power generation by 90% compared to typical fossil fuel based power plants.
The process consists of the following steps (diagram, click to enlarge):
- Wood chips or other biomass materials are loaded into the gasifier
- In the gasifier the biomass is mixed with hot sand (1,800º F / ~1000°C), turning it into product gas and residual char; a small amount of steam and the rapid release product gas provides the conveying force for the reaction
- The residual char and cooled sand (1,500 º F / ~800°C) are separated from the product gas by a cyclone separator and discharged to the combustor
- The sand is reheated in the combustor by adding air and burning the residual char; the reheated sand is removed from the combustion gas by a cyclone separator and returned to the gasifier
- The product gas is cleaned in a scrubber and can be used for a variety of applications such as direct use in gas turbines, boilers, fuel cells or the production of chemicals
- The flue gas is a valuable source of heat that can be recovered for uses such as biomass drying, steam production or direct heating
energy :: sustainability :: bioenergy :: biofuels :: renewable :: emissions :: electricity :: biomass :: gasification :: Florida ::
The contract will be filed for consideration with the Florida Public Service Commission (PSC). The company seeks PSC approval of the contract and certification of the proposed plant as a qualifying facility under Florida laws and regulations that encourage renewable energy.
In the past two years, Progress Energy has signed contracts to add nearly 300 megawatts of renewable energy to its system - which is enough to power 170,000 homes. In July, the company issued a request for renewables in an effort to continue to expand its alternative-energy portfolio.
In May 2006, Progress Energy signed a contract to purchase the energy output (130 MW) from the nation's largest biomass plant to be built in Central Florida. The project, which will utilize an environmentally friendly, dedicated energy crop known as 'E-grass' (Miscanthus x giganteus) as its fuel source, will reduce carbon emissions by more than 20 million tons over the 25-year life of the contract when compared to coal (earlier post) .
PEF purchases more than 800 megawatts from a number of qualifying facilities. They use various fuel sources, including biomass, waste heat from agricultural processes and municipal solid waste.
Progress Energy Florida is a subsidiary of Progress Energy, and provides electricity and related services to nearly 1.7 million customers in Florida.
References:
Progress Energy Florida: Progress Energy Florida signs contract for second waste-wood plant - December 18, 2007.
Biopact: Progress Energy Florida to buy electricity from largest biomass gasification plant - July 27, 2007
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