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TECHNICAL PAPERS

NOx and N2O Formation Mechanisms—A Detailed Chemical Kinetic Modeling Study on a Single Fuel Particle in a Laboratory-Scale Fluidized Bed

[+] Author and Article Information
Gerhard Löffler, Dietmar Andahazy, Christian Wartha, Franz Winter, Hermann Hofbauer

Institute of Chemical Engineering, Fuel Technology, and Environmental Technology, Vienna University of Technology, A-1060 Vienna, Austria

J. Energy Resour. Technol 123(3), 228-235 (May 10, 2001) (8 pages) doi:10.1115/1.1383973 History: Received October 30, 2000; Revised May 10, 2001
Copyright © 2001 by ASME
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References

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Figures

Grahic Jump Location
Formation rate unit (FRU) 2: 1,2[[ellipsis]]inlet of fluidizing gas, 3[[ellipsis]]mass-flow controllers, 4[[ellipsis]]display for the mass-flows, 5[[ellipsis]]preheating zone, 6[[ellipsis]]heating shells, 7[[ellipsis]]thermocouple, 8[[ellipsis]]to the chimney, 9[[ellipsis]]heated filter, 10[[ellipsis]]heated sample lines, 11[[ellipsis]]heated pump, 12[[ellipsis]]heated gas cell, 13[[ellipsis]]FTIR spectrometer, 14,15[[ellipsis]]fuel inlet, 16[[ellipsis]]flask for iodine addition in a water-bath, 17,18,19[[ellipsis]]inlet of optional reaction gas (NH3, HCN, NO, N2O).
Grahic Jump Location
Cascade of reactor units for the two-phase model
Grahic Jump Location
Calculated and measured emissions at standard conditions for important C-containing species (bituminous coal, Tbed=800°C,pO2=10 kPa)
Grahic Jump Location
Calculated and measured emissions at standard conditions for important N-containing species (bituminous coal, Tbed=800°C,pO2=10 kPa)
Grahic Jump Location
Calculated concentrations of N-containing species versus height during devolatilization (bituminous coal, Tbed=800°C,pO2=10 kPa,t=40 s; concentrations in the bubble phase and in the freeboard are represented by bold lines, those in the dense phase by thin lines)
Grahic Jump Location
Calculated concentrations of CO, CO2, and CH4 versus height during devolatilization (bituminous coal, Tbed=800°C,pO2=10 kPa,t=40 s; concentrations in the bubble phase and in the freeboard are represented by bold lines, those in the dense phase by thin lines)
Grahic Jump Location
Calculated concentrations of some radicals versus height during devolatilization (bituminous coal, Tbed=800°C,pO2=10 kPa,t=40 s; concentrations in the bubble phase and in the freeboard are represented by bold lines, those in the dense phase by thin lines)
Grahic Jump Location
Net nitrogen flow during devolatilization (Tbed=800°C,pO2=10 kPa)
Grahic Jump Location
Calculated concentrations of N-containing species versus height during char combustion (bituminous coal, Tbed=800°C,pO2=10 kPa,t=200 s; concentrations in the bubble phase and in the freeboard are represented by bold lines, those in the dense phase by thin lines)

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