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Experimental and Computational Demonstration of a Low-Temperature Waste to By-Product Conversion of U.S. Oil Shale Semi-Coke to a Flue Gas Sorbent

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  • Kathleen Dupre

    (Department of Mechanical Engineering, Boston University, 110 Cummington Mall, Boston, MA 02215, USA)

  • Emily M. Ryan

    (Department of Mechanical Engineering, Boston University, 110 Cummington Mall, Boston, MA 02215, USA
    Division of Materials Science & Engineering, Boston University, 15 Saint Mary’s St., Brookline, MA 02446, USA)

  • Azat Suleimenov

    (Division of Materials Science & Engineering, Boston University, 15 Saint Mary’s St., Brookline, MA 02446, USA)

  • Jillian L. Goldfarb

    (Department of Mechanical Engineering, Boston University, 110 Cummington Mall, Boston, MA 02215, USA
    Division of Materials Science & Engineering, Boston University, 15 Saint Mary’s St., Brookline, MA 02446, USA
    Department of Biological and Environmental Engineering, Cornell University, 226 Riley-Robb Hall, Ithaca, NY 14853, USA)

Abstract

The volatility of crude oil prices incentivizes the use of domestic alternative fossil fuel sources such as oil shale. For ex situ oil shale retorting to be economically and environmentally viable, we must convert the copious amounts of semi-coke waste to an environmentally benign, useable by-product. Using acid and acid + base treatments, we increased the surface area of the semi-coke samples from 15 m 2 /g (pyrolyzed semi-coke) to upwards of 150 m 2 /g for hydrochloric acid washed semi-coke. This enhancement in porosity and surface area is accomplished without high temperature treatment, which lowers the overall energy required for such a conversion. XRD analysis confirms that chemical treatments removed the majority of dolomite while retaining other carbonate minerals and maintaining carbon contents of approximately 10%, which is greater than many fly ashes that are commonly used as sorbent materials. SO 2 gas adsorption isotherm analysis determined that a double HCl treatment of semi-coke produces sorbents for flue gas treatment with higher SO 2 capacities than commonly used fly ash adsorbents. Computational fluid dynamics modeling indicates that the sorbent material could be used in a fixed bed reactor to efficiently remove SO 2 from the gas stream.

Suggested Citation

  • Kathleen Dupre & Emily M. Ryan & Azat Suleimenov & Jillian L. Goldfarb, 2018. "Experimental and Computational Demonstration of a Low-Temperature Waste to By-Product Conversion of U.S. Oil Shale Semi-Coke to a Flue Gas Sorbent," Energies, MDPI, vol. 11(11), pages 1-15, November.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:11:p:3195-:d:183638
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    References listed on IDEAS

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    1. Kisiela, Anna M. & Czajka, Krzysztof M. & Moroń, Wojciech & Rybak, Wiesław & Andryjowicz, Czesław, 2016. "Unburned carbon from lignite fly ash as an adsorbent for SO2 removal," Energy, Elsevier, vol. 116(P3), pages 1454-1463.
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