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Drying Kinetics of Macroalgae as a Function of Drying Gas Velocity and Material Bulk Density, Including Shrinkage

Author

Listed:
  • Craig Walker

    (College of Science and Engineering, James Cook University, Townsville 4811, Australia)

  • Madoc Sheehan

    (College of Science and Engineering, James Cook University, Townsville 4811, Australia)

Abstract

Macroalgae have many potential applications and can make important contributions to sustainability and circular economy objectives. Macroalgae are degradable high-moisture biomaterials and drying is a necessary step, but drying is an energy and capital-intensive part of their production process. This study presents convective drying curves for commercially promising fresh and saltwater species ( U. ohnoi and O. intermedium) , obtained over a range of industry-relevant drying gas velocities (0.3–2 m/s) and material bulk densities (33–100 kg/m 3 ). Pragmatic diffusion-based drying models that account for the influence of drying gas velocity, material bulk density, and material shrinkage are presented. Results provide critical insights into the validity of diffusion model assumptions for compressible biomaterials and new mechanisms describing gas penetration into such materials are proposed. The drying models provided in this work demonstrate a high degree of accuracy for both species.

Suggested Citation

  • Craig Walker & Madoc Sheehan, 2022. "Drying Kinetics of Macroalgae as a Function of Drying Gas Velocity and Material Bulk Density, Including Shrinkage," Clean Technol., MDPI, vol. 4(3), pages 1-21, July.
    • Handle: RePEc:gam:jcltec:v:4:y:2022:i:3:p:41-689:d:869095
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    References listed on IDEAS

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    1. Craig Walker & Andrew Cole & Elsa Antunes & Madoc Sheehan, 2020. "Equilibrium Moisture and Drying Kinetics Modelling of Macroalgae Species Ulva ohnoi and Oedogonium intermedium," Clean Technol., MDPI, vol. 2(2), pages 1-15, June.
    2. John J. Milledge & Benjamin Smith & Philip W. Dyer & Patricia Harvey, 2014. "Macroalgae-Derived Biofuel: A Review of Methods of Energy Extraction from Seaweed Biomass," Energies, MDPI, vol. 7(11), pages 1-29, November.
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