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Redox mediators in Li–oxygen batteries
Redox mediators (RMs) in lithium–oxygen batteries are soluble redox-active molecules or ions that shuttle charge between the insulating discharge product lithium peroxide and the electrode, lowering the charge voltage.
Redox process
The Redox process was a solvent-extraction method for reprocessing irradiated nuclear fuel, developed in 1947 and used at large scale at Hanford in Washington from 1952 until 1966 or 1967.
Redox targeting
Redox targeting is an energy-storage method in which redox mediator molecules shuttle electrons between an electrode and a solid active material not wired to the circuit.
Redox-active polymer flow batteries
Redox-active polymer flow batteries are aqueous organic redox flow batteries storing charge in redox-active polymers, first demonstrated in 2015 with dialysis membranes and a sodium chloride electrolyte.
Redox-targeting flow battery
A redox-targeting flow battery, also called a redox-mediated or redox-shuttle flow battery, is a redox flow battery that stores most of its energy as solid material held in the tanks.
Redstone Solar Thermal Power Project
The Redstone Solar Thermal Power Project is a 100 MW concentrated solar power plant with 12 hours of molten salt storage near Postmasburg, South Africa, developed by ACWA Power.
Redwater fractionation complex
The Redwater fractionation complex is a natural gas liquids fractionation and storage facility in Redwater, Alberta, owned by Pembina Pipeline and the largest in Canada.
Reed canary grass
Reed canary grass (Phalaris arundinacea) is a perennial grass native to Europe, grown for forage and, since the 1990s, as a biomass crop for solid biofuel.
Reedy Creek Gas Field
Reedy Creek Gas Field is a coal seam gas field in the Surat Basin of southeast Queensland, about 49 km north of Yuleba, developed by Australia Pacific LNG.
Reformulated gasoline blendstock
Reformulated gasoline blendstock, or RBOB, is a low-volatility, low-octane petroleum blendstock shipped to fuel terminals, where ethanol is blended in to produce reformulated gasoline under the Clean Air Act.
Reftinskaya GRES power station
Reftinskaya GRES (Рефтинская ГРЭС) is a coal-fired power station in Reftinsky, Sverdlovsk Oblast, Russia. Opened in 1970, its 3,800 MW make it the largest coal-fired plant in Russia.
ReFuelEU Aviation
ReFuelEU Aviation is a 2023 EU regulation requiring sustainable aviation fuel at EU airports, starting at 2% in 2025 and rising to 70% by 2050.
ReFuelEU Aviation SAF blending mandate
The ReFuelEU Aviation SAF blending mandate, created by EU Regulation 2023/2405, requires fuel suppliers at EU airports to blend rising shares of sustainable aviation fuel from 2% in 2025.
Refuse-derived fuel
Refuse-derived fuel is a solid fuel made by shredding municipal waste and removing metals and glass, used to supplement fossil fuels in cement kilns and boilers.
Regasification
Regasification is the process of converting liquefied natural gas (LNG) back into gas at import terminals, where it is stored cryogenically, pumped to pipeline pressure, vaporized, and sent into pipelines.
Regency Intrastate Gas (RIGS) Pipeline
The Regency Intrastate Gas (RIGS) Pipeline is a 450-mile intrastate natural gas pipeline in northern Louisiana, operated by Regency and now part of Energy Transfer.
Regenerative burner
A regenerative burner is an industrial gas burner that works in pairs with a ceramic heat-storage bed, alternately preheating combustion air with heat recovered from furnace exhaust.
Regenerative fuel cell
A regenerative fuel cell is a rechargeable electrochemical energy storage device that produces electricity from hydrogen and oxygen, and recharges by splitting the product water back into reactants.
Regional Clean Hydrogen Hubs
Regional Clean Hydrogen Hubs (H2Hubs) is a US Department of Energy program funding regional hydrogen networks with up to $7 billion; seven hubs in 16 states were selected in 2023.
Rehman Oil and Gas Field
Rehman is a tight natural gas field in Dadu District, Sindh, Pakistan, discovered in 2009 and producing since 2013, operated by PGNiG (now ORLEN) with Pakistan Petroleum.
Reichwalde Coal Mine
The Reichwalde coal mine (Tagebau Reichwalde) is an open-cast lignite mine in Saxony, Germany, operated by LEAG and supplying the Boxberg power station since 1987.
Reihoku power station
Reihoku Power Station (苓北発電所) is a coal-fired power station in Reihoku, Kumamoto Prefecture, Japan, operated by Kyushu Electric Power with two 700,000 kW units commissioned in 1995 and 2003.
Reinjection geothermal
Reinjection geothermal is the practice of returning spent geothermal fluids, brine, and condensate into the subsurface reservoir, disposing of wastewater while replenishing the reservoir to sustain power generation.
Relay coordination
Relay coordination is the process of choosing protective relay settings and time delays so devices trip in sequence during a fault, isolating the smallest part of the power system.
Reliance BP Energy Limited
Reliance BP Energy Limited, legally Reliance BP Mobility Limited, is a joint venture of Reliance Industries and bp trading as Jio-bp, formed in 2019 to run fuel stations across India.
Reliance Power
Reliance Power Limited is an Indian private-sector power company of the Anil Ambani-led Reliance Group, operating about 5,305 MW of coal, gas, solar, wind, and hydro projects.
REMIT Regulation
The REMIT Regulation, a 2011 EU law in force that December, prohibits insider trading and market manipulation in wholesale energy markets and requires reporting of trading data to ACER.
REN21
REN21, the Renewable Energy Policy Network for the 21st Century, is a global non-profit network founded in 2004 that publishes the annual Renewables Global Status Report.
ReNew Energy Global
ReNew Energy Global is an Indian renewable energy company founded by Sumant Sinha in 2011 that develops solar, wind, hydro, and battery storage projects and manufactures solar modules.
Renewable energy
Renewable energy, also called alternative energy, is energy from continually replenished natural sources: solar, wind, hydropower, geothermal, and biomass, used for electricity, heat, and fuels.