Abstract
A method to determine oxygen transfer coefficients is discussed. It is based on measuring steady-state values, which is considered to be most accurate. Although the method is very convenlent, it is seldom mentioned as possible technique. A defined flow is withdrawn from the reactor, de-aerated by stripping with nitrogen, and recirculated. From the flow and steady-state values of the oxygen tension in the reactor and the recirculation flow, the ka value can be calculated. Although generally applicable, this method is especially suitable for model systems without real oxygen consumption. In this paper it is illustrated for ka determination in a liquid-impelled loop reactor.
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