Tubular Membrane Microreactors

In the fabrication of FIFMMRs, the porous hollow fiber membranes with asymmetric structures are first prepared through a phase-inversion/ sintering technique, which has been described in Chapter 2 of this book and in many recent publications [31]. The microstructure of the hollow fibers can be tailored as expected for different applications by modulation of the suspension composition and the spinning parameters [32, 33]. Aran et al. [5,21] developed porous AI2O3 FIFMMRs with various geometrical parameters for gas-liquid-solid (G-L-S) reactions. The Pd-AhOa catalyst 

Utilization of porous ceramic honeycomb monoliths could realize large networks of microcharmel membranes for gas separation with superior mechanical stability. By increasing the thickness of the membrane 

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In a study by Yamamoto et al., a simple microreactor was constructed by inserting an SS rod into a Pd membrane tubular reactor to investigate the effects of microcharmel size on the dehydrogenation of cyclohexane to benzene [27, 28]. As shown in Figure 10.5b, it was found that at higher temperatures, increased surface area and a longer residence time for the reactants result in greater benzene production. For a... 

Yamamoto et al. [27,28] revealed the advantages of applying a microreactor for the dehydrogenation of cyclohexane by using a Pd membrane as a heterogeneous catalyst These authors demonstrated that the yield of this reaction can be doubled by inserting a stainless steel rod with a proper size into a tubular Pd membrane reactor supported by an a-alumina porous tube to form microchannels. 

A distinctive feature of microreactors is the microchannels for fluid flow. MMRs are mainly characteristic of such microchannels with anchored catalysts for reactions and miniature membranes to perform separation, which are formed on the porous ceramic or metal supports. Based on the configuration and architecture of the reactor, MMRs can be classified into two categories plate type and tubular type. 

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