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TECHNICAL PAPERS: Fuels and Combustion Technology

Fine Particulate Formation During Switchgrass/Coal Cofiring

[+] Author and Article Information
Linda G. Blevins, Thomas H. Cauley

Combustion Research Facility, P.O. Box 969, MS 9052, Sandia National Laboratories, Livermore, CA 94551-0969

J. Eng. Gas Turbines Power 127(3), 457-463 (Jun 24, 2005) (7 pages) doi:10.1115/1.1804540 History: Received April 03, 2003; Revised October 01, 2003; Online June 24, 2005
Copyright © 2005 by ASME
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References

Figures

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Schematic of Sandia MFC showing wall temperatures used for the present experiments. The wall temperature gradient was selected to mimic the convection pass of a boiler. CEM=continuous emissions monitor.
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Schematic of fine particle sampling system
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Dilution probe used for fine particle sampling. The primary dilution ratio in the probe is 22:1.
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Normalized number distribution for natural gas background
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Normalized number distribution for 0%, 25%, 50%, 75%, and 100% coal cofired with switchgrass. Type I uncertainty intervals are shown.
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Correlation of number density of particles between 200 nm and 1 μm with rate of coal addition to the reactor demonstrating that the particles in this size range originate from ash breakup
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Total number densities for particles between 10 nm and 1 μm in diameter for 0%, 25%, 50%, 75%, and 100% coal cofired with switchgrass
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Normalized mass distributions for 0%, 25%, 50%, 75%, and 100% coal cofired with switchgrass. Particle density is assumed to be 1.2 g/cm3 density.
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Total mass concentrations between 10 nm and 1 μm in diameter for 0%, 25%, 50%, 75%, and 100% coal cofired with switchgrass

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