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Techno-Economic Assessment of Co-Hydrothermal Carbonization of a Coal-Miscanthus Blend

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  • Akbar Saba

    (Institute for Sustainable Energy and the Environment, 1 Ohio University, Athens, OH 45701, USA
    Department of Mechanical Engineering, 1 Ohio University, Athens, OH 45701, USA)

  • Kyle McGaughy

    (Institute for Sustainable Energy and the Environment, 1 Ohio University, Athens, OH 45701, USA
    Department of Chemical and Biomolecular Engineering, 1 Ohio University, Athens, OH 45701, USA)

  • M. Toufiq Reza

    (Institute for Sustainable Energy and the Environment, 1 Ohio University, Athens, OH 45701, USA
    Department of Mechanical Engineering, 1 Ohio University, Athens, OH 45701, USA)

Abstract

Co-Hydrothermal Carbonization (Co-HTC) is a thermochemical process, where coal and biomass were treated simultaneously in subcritical water, resulting in bulk-homogenous hydrochar that is carbon-rich and a hydrophobic solid fuel with combustion characteristics like coal. In this study, technoeconomic analysis of Co-HTC was performed for a scaled-up Co-HTC plant that produces fuel for 110 MWe coal-fired power plant using Clarion coal #4a and miscanthus as starting feedstocks. With precise mass and energy balance of the Co-HTC process, sizing of individual equipment was conducted based on various systems equations. Cost of electricity was calculated from estimated capital, manufacturing, and operating and maintenance costs. The breakeven selling price of Co-HTC hydrochar was $117 per ton for a 110 MWe. Sensitivity analysis indicates that this breakeven selling price could be as low as $106 per ton for a higher capacity plant. Besides plant size, the price of solid fuel is sensitive to the feedstock costs and hydrochar yield.

Suggested Citation

  • Akbar Saba & Kyle McGaughy & M. Toufiq Reza, 2019. "Techno-Economic Assessment of Co-Hydrothermal Carbonization of a Coal-Miscanthus Blend," Energies, MDPI, vol. 12(4), pages 1-17, February.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:4:p:630-:d:206359
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    References listed on IDEAS

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    Cited by:

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    4. Surup, Gerrit Ralf & Leahy, James J. & Timko, Michael T. & Trubetskaya, Anna, 2020. "Hydrothermal carbonization of olive wastes to produce renewable, binder-free pellets for use as metallurgical reducing agents," Renewable Energy, Elsevier, vol. 155(C), pages 347-357.
    5. Azzaz, Ahmed Amine & Khiari, Besma & Jellali, Salah & Ghimbeu, Camélia Matei & Jeguirim, Mejdi, 2020. "Hydrochars production, characterization and application for wastewater treatment: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 127(C).
    6. Manfredi Picciotto Maniscalco & Maurizio Volpe & Antonio Messineo, 2020. "Hydrothermal Carbonization as a Valuable Tool for Energy and Environmental Applications: A Review," Energies, MDPI, vol. 13(16), pages 1-26, August.
    7. López, R. & González-Arias, J. & Pereira, F.J. & Fernández, C. & Cara-Jiménez, J., 2021. "A techno-economic study of HTC processes coupled with power facilities and oxy-combustion systems," Energy, Elsevier, vol. 219(C).
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