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Search (https://www.facebook.com/NationalEnergyTechnologyLaborato (https://www.linkedin.com/company/national- (https://twitter.com/NETL_DOE) (https://www.instagram.com/netl_doe/? (https://www.youtube.com/NETLMultimedia) (https://www. ickr.com/photos/netlmultimedia/ (https://netl.doe.gov/) ref=mf) energy-hl=en) technology- laboratory) PLASMA GASIFICATION What is Plasma? Plasma, referred to as the "fourth state of matter," is a very high temperature, highly ionized (electrically charged) gas capable of conducting electrical current. Examples of plasma in nature include lightning and gas at the surface of the sun. Plasma technology has a long history of development and has evolved into a valuable tool for engineers and scientists who need to use very high temperatures for new process applications. Man-made plasma is formed by passing an electrical discharge through a gas such as air or oxygen (O2). The interaction of the gas with the electric arc dissociates the gas into electrons and ions, and causes its temperature to increase signi cantly, often exceeding 6,000°C, nearly as hot as the sun's surface. Figures 1 and 2 show a schematic drawing and a picture, respectively, of a plasma torch used to generate
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