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Theoretical formulation of sieving coefficient evaluation for membrane plasma separation.

A Weryński, P S Malchesky, J J Lewandowski

    Artificial Organs
    |August 1, 1985
    PubMed
    Summary

    This study theoretically investigates three sieving coefficient definitions. The local sieving coefficient can be calculated from measurements, while the device sieving coefficient is validated for kinetic modeling.

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    Area of Science:

    • Membrane science and engineering
    • Chemical engineering

    Background:

    • Sieving coefficients are crucial for understanding membrane performance.
    • Accurate determination of sieving coefficients is essential for process design and optimization.
    • Existing methods for evaluating sieving coefficients may have limitations.

    Purpose of the Study:

    • To theoretically investigate three distinct definitions of the sieving coefficient.
    • To establish methods for calculating the local sieving coefficient from experimental data.
    • To validate the evaluation of the device sieving coefficient for kinetic modeling applications.

    Main Methods:

    • Theoretical analysis of three sieving coefficient definitions.
    • Derivation of calculation methods for the local sieving coefficient using input-output measurements.

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  • Validation of the device sieving coefficient evaluation under specific conditions.

    • Main Results:

    • The local sieving coefficient, reflecting membrane properties, can be determined from input-output measurements under certain assumptions.
    • The device sieving coefficient is validated for kinetic modeling, particularly when local sieving coefficient calculation incurs significant error.
    • The interrelationship between the different sieving coefficient definitions has been elucidated.

    Conclusions:

    • This work clarifies the theoretical underpinnings of different sieving coefficient definitions.
    • Provides practical methods for calculating and evaluating sieving coefficients in membrane processes.
    • Highlights the importance of selecting the appropriate sieving coefficient for specific applications like kinetic modeling.