which converts to harmless nitrogen gas. Small levels of ammonia and hydrogen cyanide are produced, and must be removed during the syngas cooling process. In the case of power generation, NOx also can be formed downstream by the combustion of syngas in turbines. See also Edwardsport Power Station Fischer–Tropsch process Georgetown Coal Gasification Plant History of manufactured gas Kemper Project Sasol Secunda CTL References External links Gasifipedia, a comprehensive online collection of resources to promote better understanding of gasification technology (with an emphasis on coal gasification), developed and maintained by the U.S. Department of Energy's National Energy Technology Laboratory (NETL) The Gasification Systems Program, of the U.S. Department of Energy's National Energy Technology Laboratory (NETL) "Practical Experience Gained During the First Twenty Years of Operation of the Great Plains Gasification Plant and Implications for Future Projects" (PDF-3.1MB), DOE's Office of Fossil Energy, May 2006. Coal gasification technologies Industrial gases