high calorific value Semi-water gas Semi-water gas is a mixture of water gas and producer gas made by passing a mixture of air and steam through heated coke. The heat generated when producer gas is formed keeps the temperature of the coke high enough to allow water gas to be formed. Water gas shift reaction Pure hydrogen can be obtained from water gas by using the water-gas shift reaction, after subsequent removal of the carbon dioxide formed when carbon monoxide reacts with water. Uses Completely displaced by syngas, water gas could be applied to certain fuel cells. Used in Fischer–Tropsch process. It reacts with producer gas to produce fuel gas. It could also be used to gain pure hydrogen for synthesis of ammonia. See also Fluidized bed Fluidized bed combustion Gasification Linde–Frank–Caro process List of solid waste treatment technologies Plasma gasification Producer gas Pyrolysis Renewable natural gas Wood gas References Mellor, J.W., Intermediate Inorganic Chemistry, Longmans, Green and Co., 1941, pp. 210–211 Adlam, G.H.J. and Price, L.S., A Higher School Certificate Inorganic Chemistry, John Murray, 1944, page 309 History e-book project. ACLS Humanities E-book. Vol 5. "The use of mineral oil" p. 119 The chemistry of gas lighting, 1850. Fuel gas Hydrogen production Synthetic fuel technologies Industrial gases History of chemistry pl:Gaz wodny