OxyFuel Combustion of Coal and Biomass

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Oxy-Fuel Combustion of Coal and Biomass

• Maja Bøg Toftegaard, Industrial PhD
• Anker Degn Jensen, Peter Glarborg, Peter Arendt
  Jensen
• Bo Sander (DONG Energy)

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Presentation Outline

• The oxyfuel technology
• Project objectives
• Literature survey
• The experimental setup
• Summary

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Oxyfuel Power Plant

• Changes from conventional plant
• Pure O2
• Recirculated flue gas
• High CO2, H2O, SO2 in boiler
• Combustion characteristics
• Corrosion
• Ash and deposition compositions

www.kjell-design.com
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Project Objectives

• Overall objective
• Investigate combustion fundamentals when firing
  coal and biomass in an oxyfuel atmosphere
• Specific subjects
• Sulphur in ash and deposits
• Decreasing oxygen excess
• Co-firing coal with straw

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Literature Survey

• Plant perspectives for retrofit case
• Combustion fundamentals
• Submitted to the journal Progress in Energy and
  Combustion Science

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Experimental Investigations

• Setup type 30 kW swirl burner
• Fuels natural gas, coal, straw
• Oxidant air mixtures of O2, CO2, N2, NO, and
  SO2
• Characterisation methods
• online gas analysis of O2, CO2, CO, NO, and SO2
• sampling system for fly ash
• deposit probe
• advanced diagnostics FTIR probe (T, conc.) IR
  CCD camera (particle T)

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Experimental Results - Example
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Summary

• Oxyfuel combustion promising technology for
  carbon capture and storage
• Several questions still remain to be answered
• Fate of sulphur in boiler
• Potential to decrease efficiency penalty by
  decreasing oxygen excess
• Below zero CO2 emissions from utilization of
  biomass

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Tak for opmærksomheden/ Thanks for the Attention !