Transfer in Microstructured Falling Film Reactors

33 Mass Transfer in Microstructured Falling Film Reactors 

The main drawback of the microstructured falling film reactor is the short residence time of the liquid in the channels, which typically varies from 5 to 20 s, depending on the physical properties of the liquid and the operating conditions. 

The residence time can be increased by lengthening the channels or by decreasing the angle of descent, which can be achieved with a helicoidal microchannel falling film reactor. The residence time was found to be increased by a factor of about 50 in a microchannel when the angle of descent was decreased from 90 to 7.5° [14]. 

The mass transfer data on falling film microstructured reactor are presented in Table 7.6. 

Regime and system Conditions and definition Global volumetric mass transfer coefficient 

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Example 7.4 investigates the mass transfer in microstructured falling film reactor. 

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