Oxygen transfer coefficients by dynamic model moment analysis

Authors

  • N. D. P. Dang,

    1. Swiss Federal Institute of Technology (ETH), CH-8092 Zürich, Switzerland
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    • Technisch-chemisches Laboratorium.

  • D. A. Karrer,

    1. Swiss Federal Institute of Technology (ETH), CH-8092 Zürich, Switzerland
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    • Mikrobiologisches Institut.

  • I. J. Dunn

    Corresponding author
    1. Swiss Federal Institute of Technology (ETH), CH-8092 Zürich, Switzerland
    • Swiss Federal Institute of Technology (ETH), CH-8092 Zürich, Switzerland
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    • Technisch-chemisches Laboratorium.


Abstract

A new method to estimate the oxygen transfer coefficient (KLa) from the experimental dynamic response data is presented. Employing a linear model which allows for gas phase, diffusion film, and oxygen electrode dynamics, the first moment of the response curve is simply related to the sum of the model parameters. Two separate experiments are used to characterize the measurement dynamics and to measure the unknown KLa parameter. The simple calculation procedure involves only measuring the area above the response curves.

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