page_title: Oxy-fuel combustion process
hierarchical_section_title: Oxy-fuel combustion process
caption_attribution_description: A schematic showing the operation of a oxyfuel carbon capture and storage (CCS) fossil fuel power plant. The schematic was based on the image at http://news.bbc.co.uk/2/hi/science/nature/7586569.stm , and the information in EOS magazine, March 2010. 1= air inlet 2= mechanical energy is supplied 3= nitrogen outlet 4= oxygen outlet 5= recycled exhaust gas inlet 6= fuel inlet (ie coal, ...) 7= cold water pipe 8= steam inlet pipe 9= steam turbine 10= steam outlet pipe 11= steam condensor 12= cooling pipe of steam condensor 13= bottom ash 14= fly-ash removal 15= sulphur + gypsum removal 16= cooler 17= water condensor (water removal) 18= mechanical energy is supplied (CO²-compressor) 19= CO² outlet Note 1: 6, 7 and 8 form the whole of the firebox &lt; br/&gt; Note 2: for the workings of the steam condensor (a non essential part, simply increases efficiency), see http://commons.wikimedia.org/wiki/File:Surface_Condenser.png &lt; br/&gt;
context_page_description: Oxy-fuel combustion is the process of burning a fuel using pure oxygen instead of air as the primary oxidant. Since the nitrogen component of air is not heated, fuel consumption is reduced, and higher flame temperatures are possible. Historically, the primary use of oxy-fuel combustion has been in welding and cutting of metals, especially steel, since oxy-fuel allows for higher flame temperatures than can be achieved with an air-fuel flame.
  There is currently research being done in firing fossil-fueled power plants with an oxygen-enriched gas mix instead of air. Almost all of the nitrogen is removed from input air, yielding a stream that is approximately 95% oxygen. Firing with pure oxygen would result in too high a flame temperature, so the mixture is diluted by mixing with recycled flue gas, or staged combustion. The recycled flue gas can also be used to carry fuel into the boiler and ensure adequate convective heat transfer to all boiler areas. Oxy-fuel combustion produces approximately 75% less flue gas than air fueled combustion and produces exhaust consisting primarily of CO₂ and H₂O.
context_section_description: Oxy-fuel combustion is the process of burning a fuel using pure oxygen instead of air as the primary oxidant. Since the nitrogen component of air is not heated, fuel consumption is reduced, and higher flame temperatures are possible. Historically, the primary use of oxy-fuel combustion has been in welding and cutting of metals, especially steel, since oxy-fuel allows for higher flame temperatures than can be achieved with an air-fuel flame.
  There is currently research being done in firing fossil-fueled power plants with an oxygen-enriched gas mix instead of air. Almost all of the nitrogen is removed from input air, yielding a stream that is approximately 95% oxygen. Firing with pure oxygen would result in too high a flame temperature, so the mixture is diluted by mixing with recycled flue gas, or staged combustion.  The recycled flue gas can also be used to carry fuel into the boiler and ensure adequate convective heat transfer to all boiler areas. Oxy-fuel combustion produces approximately 75% less flue gas than air fueled combustion and produces exhaust consisting primarily of CO₂ and H₂O (see figure).
caption: Oxyfuel CCS power plant operation
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