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    •   MOspace Home
    • University of Missouri-Columbia
    • Graduate School - MU Theses and Dissertations (MU)
    • Theses and Dissertations (MU)
    • Dissertations (MU)
    • 2006 Dissertations (MU)
    • 2006 MU dissertations - Freely available online
    • View Item
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    Catalytic conversion of glycerol and sugar alcohols to value-added products

    Dasari, Mohanprasad A., 1979-
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    [PDF] research.pdf (1.314Mb)
    Date
    2006
    Format
    Thesis
    Metadata
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    Abstract
    The current research is based on developing an improved and fundamental understanding of technology that will allow the conversion of this crude glycerin to a propylene glycol based antifreeze product. Hydrogenolysis of glycerol to propylene glycol was performed using copper chromite catalyst. At temperatures above 200C̕ and hydrogen pressure of 200 psi, the selectivity to propylene glycol decreased due to excessive hydrogenolysis of the propylene glycol. The yield of propylene glycol increased with decreasing water content. The main causes for the deactivation were reduction of the cuprous chromium active species into metallic copper species, metal leaching, and blocking of sites by strongly adsorbed inorganic and organic species present in the feed or generated during the reaction. A new reaction pathway for converting glycerol to propylene glycol via an intermediate was validated by isolating the acetol intermediate. In the first step involves dehydration of glycerol to acetol with subsequent hydrogenation of acetol to propylene glycol. High acetol selectivities ([greater than] 90%) were achieved using copper-chromite catalyst and operating in semi-batch reactive distillation mode. The acetol from this reaction readily hydrogenates to from propylene glycol with selectivities exceeding 95%.
    URI
    https://hdl.handle.net/10355/4331
    https://doi.org/10.32469/10355/4331
    Degree
    Ph. D.
    Thesis Department
    Chemical engineering (MU)
    Collections
    • 2006 MU dissertations - Freely available online
    • Chemical Engineering electronic theses and dissertations (MU)

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