Cofiring of Coal and Biomass Under Oxycombustion Conditions: NOx Formation and PM Characterization Ben Kumfer Scott Skeen Richard Axelbaum Laboratory for Advanced Combustion & Energy Research Dept. of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, MO
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Ben Kumfer Scott Skeen Richard Axelbaum Laboratory for Advanced Combustion & Energy Research
Cofiring of Coal and Biomass Under Oxycombustion Conditions: NOx Formation and PM Characterization. Ben Kumfer Scott Skeen Richard Axelbaum Laboratory for Advanced Combustion & Energy Research Dept. of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, MO. - PowerPoint PPT Presentation
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Cofiring of Coal and Biomass Under Oxycombustion Conditions:
NOx Formation and PM Characterization
Ben KumferScott Skeen
Richard Axelbaum
Laboratory for Advanced Combustion & Energy ResearchDept. of Energy, Environmental & Chemical Engineering,
Washington University in St. Louis, MO
Oxy-Fuel with Carbon Capture
Cofiring Biomass:
•Potentially Carbon negative means of power generation
•Utilizes renewable fuels
biomass
CO2
[CO2] > 95% (dry)
air separation
unit
purification
compression
coal
FGR
geo -sequestration
O2
N2air
• High CO2 concentration in flue gas
• Parasitic load for air-separation
• Large reduction in NOx can result through RFG
• Potential for improved boiler efficiency
Conventional vs. Oxy-Combustion
Conventional Coal/Air Combustion
air
coal+airPrimary
Oxy-Coal Combustion
air
Secondary
Secondary
O2+RFG
fuel+RFG+O2
Secondary
Secondary O2+RFG
Primary
Questions:
Is there an optimum set of PO and SO compositions for NOx?
What is the influence of oxy-combustion on ash properties?
What are the consequences of cofiring biomass under air-fired and oxy-combustion conditions?