Theses and Dissertations
Issuing Body
Mississippi State University
Advisor
Kirkland, Brenda L.
Committee Member
Clary, Renee M.
Committee Member
Schmitz, Darrel
Committee Member
Gabitov, Rinat
Date of Degree
12-14-2013
Document Type
Graduate Thesis - Open Access
Major
Geology
Degree Name
Master of Science (M.S.)
College
College of Arts and Sciences
Department
Department of Geosciences
Abstract
Flue gas desulfurization (FGD) is utilized by the coal-powered generating industry to safely eliminate sulfur dioxide. A FGD vessel (scrubber) synthetically creates gypsum crystals by combining limestone (CaCO3), SO2 flue gas, water and oxygen resulting in crystalline gypsum (CaSO4 ∙ 2H2O), which can be sold for an economic return. Flat disk-like crystals, opposed to rod-like crystals, are hard to dewater, lowering economic return. The objectives were to investigate the cause of varying morphologies, understand the environment of precipitation, as well as identify correlations between operating conditions and resulting unfavorable gypsum crystal growth. Results show evidence supporting airborne impurities due to the onsite coal pile, the abundance and size of CaCO3 and high Ca:SO4 ratios within the scrubber as possible factors controlling gypsum crystal morphology. In conclusion, regularly purging the system and incorporating a filter on the air intake valve will provide an economic byproduct avoiding costly landfill deposits.
URI
https://hdl.handle.net/11668/18983
Recommended Citation
Lewis, Kinsey M (Kinsey Morgan), "Factors influencing Gypsum Crystal Morphology within a Flue Gas Desulfurization Vessel" (2013). Theses and Dissertations. 2213.
https://scholarsjunction.msstate.edu/td/2213