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Oxy-Fuel Combustion of Coal and Biomass

Oxy-Fuel Combustion of Coal and Biomass. Maja Bøg Toftegaard, Industrial PhD Anker Degn Jensen, Peter Glarborg, Peter Arendt Jensen Bo Sander (DONG Energy). Presentation Outline. The oxyfuel technology Project objectives Literature survey The experimental setup Summary.

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Oxy-Fuel Combustion of Coal and Biomass

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  1. Oxy-Fuel Combustion of Coal and Biomass Maja Bøg Toftegaard, Industrial PhD Anker Degn Jensen, Peter Glarborg, Peter Arendt Jensen Bo Sander (DONG Energy)

  2. Presentation Outline • The oxyfuel technology • Project objectives • Literature survey • The experimental setup • Summary

  3. 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

  4. 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

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

  6. 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)

  7. Experimental Results - Example

  8. 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

  9. Tak for opmærksomheden/ Thanks for the Attention !

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