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Related Experiment Videos

Pellicular expanded bed matrix suitable for high flow rates.

E Pålsson1, P E Gustavsson, P O Larsson

  • 1Department of Pure and Applied Biochemistry, Center for Chemistry and Chemical Engineering, Lund University, Sweden.

Journal of Chromatography. A
|June 8, 2000
PubMed
Summary

A novel expanded bed matrix featuring a stainless steel core with an agarose layer demonstrates superior performance compared to existing matrices. This new matrix offers stable operation and excellent mass transfer properties for chromatographic applications.

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Area of Science:

  • Biotechnology
  • Chemical Engineering
  • Separation Science

Background:

  • Expanded bed adsorption (EBA) is a powerful technique for direct capture of biomolecules from complex feed streams.
  • Development of robust and efficient matrices is crucial for optimizing EBA processes.
  • Existing matrices may have limitations in terms of stability, flow rates, or mass transfer efficiency.

Purpose of the Study:

  • To develop and characterize a new expanded bed matrix with a stainless steel core and agarose layer.
  • To evaluate the performance of the new matrix in terms of dispersion behavior, stability, and mass transfer properties.
  • To compare the new matrix against a commercially available Streamline matrix.

Main Methods:

  • Preparation of two bead size fractions (32-75 µm and 75-180 µm) of the novel matrix.

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  • Characterization of dispersion behavior using retention time distribution (RTD) in packed and expanded bed modes.
  • Mechanical stability testing and assessment of mass transfer properties at high flow rates (up to 3000 cm/h).

    • Main Results:

    • The new matrix exhibited favorable dispersion behavior compared to the Streamline matrix.
    • The larger bead fraction (75-180 µm) allowed for stable expanded beds at high flow rates (3000 cm/h).
    • The matrices demonstrated excellent mechanical stability and durability over prolonged use, with no cracking or peeling.

    Conclusions:

    • The developed stainless steel-cored agarose matrix is a promising alternative for expanded bed applications.
    • Its superior performance in terms of stability and mass transfer at high flow rates offers advantages for bioseparation processes.
    • The mechanical robustness ensures suitability for industrial-scale chromatographic separations.