340 articles
Silicon Ranch Corp
Silicon Ranch Corp is a Nashville-based solar energy company founded in 2011 by former Tennessee officials, operating more than 180 solar farms across the United States and Canada.
Siloxane removal
Siloxane removal is the elimination of volatile methyl siloxanes from biogas, landfill gas, and digester gas before burning, since combustion forms abrasive silicon dioxide that damages engines.
Simmering power station
Simmering power station (Kraftwerk Simmering) is a power plant complex in Vienna, Austria, generating electricity since 1902; its wood-fired biomass plant opened in 2006 as Europe's largest forest-biomass power station.
Simultaneous saccharification and fermentation
Simultaneous saccharification and fermentation (SSF) is a biofuel process in which cellulose is broken down by enzymes and fermented to ethanol in a single reactor.
Small Refinery Exemption
A Small Refinery Exemption is a US EPA waiver under the Clean Air Act freeing a small refinery from Renewable Fuel Standard obligations for disproportionate economic hardship.
Solar Energy Industries Association
The Solar Energy Industries Association, founded in 1974, is the national trade association for the U.S. solar and energy storage industry, representing about 1,000 member companies.
South African Renewable Energy Independent Power Producer Procurement Programme
The South African Renewable Energy Independent Power Producer Procurement Programme (REIPPPP) is a competitive auction program launched in 2011 to buy renewable electricity from private producers.
SSG wave energy generator
The SSG (Sea-wave Slot-cone Generator) is a Norwegian overtopping wave energy converter, patented in 2003, in which waves fill stacked reservoirs that drain through turbines to generate electricity.
St1
St1 is a Finnish energy company, founded in 1997, operating across Finland, Sweden, Norway, and the United Kingdom in oil products, biogas, sustainable aviation fuel, and renewable diesel.
State Grid Xinyuan
State Grid Xinyuan Holdings Co. (国网新源) is a Beijing company, founded in 2005, that operates pumped-storage hydropower stations and is the world's largest pumped-storage operator.
Statera Energy
Statera Energy is a London-headquartered UK company developing grid-scale battery storage, flexible generation, pumped hydro, and green hydrogen, founded in 2015 and owned by EQT Infrastructure since 2024.
Steam explosion
Steam explosion, also called autohydrolysis, is a pretreatment that heats lignocellulosic biomass with high-pressure steam and rapidly releases the pressure, rupturing cell walls for enzyme conversion.
Sunly
Sunly is an Estonian renewable energy producer founded in 2019 and based in Tallinn, developing solar, wind, battery, and hybrid parks across the Baltics and Poland.
Sunsave
Sunsave is a London-based British startup, founded in 2022 by Alick Dru and Ben Graves, offering the UK's first FCA-authorized solar subscription with no upfront cost.
Supercritical methanol method
The supercritical methanol method, also called the Saka method, is a catalyst-free process for making biodiesel, introduced in 2001 by Shiro Saka and Dadan Kusdiana at Kyoto University.
Supercritical water gasification of biomass
Supercritical water gasification (SCWG) of biomass is a thermochemical process that gasifies wet biomass in water above its critical point into hydrogen-rich gas, pioneered at MIT in 1978.
Sustainable Aviation Fuel
Sustainable aviation fuel (SAF) is a drop-in jet fuel blending component made from renewable or waste feedstocks, cutting lifecycle carbon emissions by around 80% while working in existing aircraft and engines.
Sustainable energy
Sustainable energy, also known as green energy or alternate energy, is energy that meets present needs without compromising future generations, drawing on renewables such as solar and wind, nuclear power, and energy efficiency.
Sustainable Marine Energy
Sustainable Marine Energy is a UK-based tidal energy company known for its floating PLAT-I platforms, which delivered the first floating in-stream tidal power to Nova Scotia's grid in 2022.
Suzano Mucuri power station
Suzano Mucuri power station (Portuguese: Usina de biomassa Suzano Mucuri), also known as Bahia Sul, is a 214 MW biomass-fired power station in Mucuri, Bahia, Brazil.
Suzukawa Energy Center
Suzukawa Energy Center is a Japanese power company in Fuji, Shizuoka that ran a 112 MW plant at the Nippon Paper Fuji mill, converted to biomass in 2022.
Synthesized iso-paraffins from fermented hydroprocessed sugar
Synthesized iso-paraffins from fermented hydroprocessed sugar (SIP) is a sustainable aviation fuel pathway in which engineered microbes ferment sugar into farnesene, hydrotreated to farnesane and blended into jet fuel at up to 10 percent.
The Andersons
The Andersons is a North American agriculture and renewable fuels company headquartered in Maumee, Ohio. Founded in 1947, it handles grain and produces ethanol at four plants.
Thin stillage
Thin stillage is the liquid coproduct of grain ethanol production, separated from whole stillage by centrifugation after distillation; most is recycled as process water or evaporated into feed.
Tidal barrage
A tidal barrage is a dam-like structure built across an estuary or bay that traps tidal water and releases it through turbines to generate electricity.
Tidal lagoon
A tidal lagoon is a proposed form of tidal range power station: a man-made impoundment basin with embedded turbines that generates electricity from the rise and fall of the tide.
Tidal power
Tidal power, also called tidal energy, generates electricity from ocean tides or their currents using barrages and underwater turbines, and its output is predictable years in advance.
Tocardo
Tocardo is a Dutch tidal power company in Den Oever, Netherlands, founded in 2008, whose horizontal-axis tidal turbines include a 1.25 MW array in the Eastern Scheldt storm surge barrier.
Torrefaction
Torrefaction is a thermal pretreatment that heats biomass to 200–300 °C in an oxygen-free atmosphere, producing a coal-like fuel called biocoal for co-firing and gasification.
Torrefied biomass
Torrefied biomass, or bio-coal, is a solid biofuel made by heating wood or agricultural residue to 200–300 °C in an inert atmosphere so it burns like coal.