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Affect of Emission Controls on the Elemental Concentration and Particle Size of Coal Ash

Praechter, Todd A
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1378196568

Abstract Details

2013, MS, University of Cincinnati, Engineering and Applied Science: Mechanical Engineering.
Instrumental Neutron Activation Analysis (INAA) was used to evaluate the elemental composition of ash samples collected from the baghouse, electro-static precipitator, and multi-cyclone separator at the steam generation plant at the University of Cincinnati. Twenty-seven individual quantifiable elements were found in the samples including samples of crushed coal. The concentrations of elements were reported according to sample type and classified into three groups: class 1 elements [Al, Fe, Hf, K, Mn, Ni, Ta, Tb, Th, and U] were those that were equally dispersed between fly and bottom ash, class 2 elements [Ba, Cr, Sb, Se, V, and Zn] were enriched in fly ash, class 3 elements [Ce, Cs, Co, Eu, Na, Rb, Sc, Ti, Yb, and Zr] were distributed randomly between class 1 and class 2 elements. Scanning electron microscopy was used to evaluate the size of more than 2700 particles collected from the baghouse, electro-static precipitator and multi-cyclone as well as bottom ash. Particles from the electro-static precipitator exhibited the smallest average particle size [9 µm] followed by the baghouse [13 µm]. Elements collected by the electro-static precipitator included Ag, Cr, Sb, Se and V, which are among the smallest particles. However, particle size within the flue gas stream is greatly affected by the volatility of the element, so that the elemental composition of particles collected at different stages in the flue gas stream will vary based upon the type of engineering controls used to reduce emissions. Thus, samples of ash collected for nuclear forensics analysis to detect undisclosed processes involving nuclear and radiological materials will contain different elements depending upon the type of engineering controls used to reduce emissions.
Henry Spitz, Ph.D. (Committee Chair)
Sam Glover, Ph.D. (Committee Member)
Milind Jog, Ph.D. (Committee Member)
72 p.
Mechanics
Coal Ash; Fly Ash; Elemental Concentrations; Particle Distribution; Emission Controllers

Recommended Citations

Citations

  • Praechter, T. A. (2013). Affect of Emission Controls on the Elemental Concentration and Particle Size of Coal Ash [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1378196568

    APA Style (7th edition)

  • Praechter, Todd. Affect of Emission Controls on the Elemental Concentration and Particle Size of Coal Ash. 2013. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1378196568.

    MLA Style (8th edition)

  • Praechter, Todd. "Affect of Emission Controls on the Elemental Concentration and Particle Size of Coal Ash." Master's thesis, University of Cincinnati, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1378196568

    Chicago Manual of Style (17th edition)

ucin1378196568
507
© 2013, some rights reserved.Creative Commons License Affect of Emission Controls on the Elemental Concentration and Particle Size of Coal Ash by Todd A Praechter is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Cincinnati and OhioLINK.