Specific product performance

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The term specific product output of a reaction vessel ( reactor ) is understood to mean the amount of product formed per space and time in a reactor, for example t (tons) of ammonium sulfate nitrate per cubic meter and year or kg per liter and second .

The use of the term only makes sense in relation to continuous reactors , since set-up times make up a large part of the operating time in intermittent operation .

One finds in the literature often the term space-time yield (English: space-time yield ), since it but the term yield is a kind of subset confusion are possible, which are avoided by the use of specific product performance. In contrast, the term spacetime , which stands for the denominator part of the definition for the specific product performance, is e.g. B. 1 / (l · sec) is often used in the optimization of reactors.

The space-time yield in heterogeneously catalyzed reactions is in some cases also related to the volume or the mass of a catalyst (example kg of product per kg of catalyst and hour ).

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