Schwab-type reactor

Fig. 5. Modified Schwab-type reactor for rate measurements.

It will be seen from the subsequent discussions of diffusion effects that the constancy of reactant concentration, as well as gas pressure, throughout an experiment in the Schwab-type reactor eliminates a number of complicating effects which otherwise arise from changes in the diffusive flow conditions (Section IV.2). This constitutes an important advantage of this experimental method. 

This places a burden on the interpretation of static experiments (or equivalent flow reactor experiments), and conditions should therefore be established which are free of diffusion effects. In connection with these difficulties the advantage of experimental methods such as the Schwab-type reactor system becomes quite apparent, since no variations of pressure or concentration occur during the measurements in this system. 

The apparatus is a modification of the Schwab type of reactor described by Weisz and Prater (1) and is illustrated in Fig. 3. In view of the... 

When this reaction rate was measured by the rate of molar gas formation in a Schwab type differential reactor 28, 28a) over silica-alumina catalyst, this rate was found not greatly affected by the introduction of a platinum component into the catalyst mass the observed gas formation rate remained controlled by the acidic activity alone. Yet, an analysis of the gas produced, and of the liquid product, showed a shift in product composition... 

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