Disadvantage of Carbon Membranes

Although carbon membranes have a number of advantages, a few disadvantages of carbon membranes have been identified. 

A carbon membrane is very brittle and fragile, and therefore it needs to be handled with care, which can be very demanding. 

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Carbon membranes are manufactured in a hollow fiber shape (Fig. 9.1) that can be arranged in multi-fiber modules. They exhibit moderate selectivity to H2, e.g., H2-to-isobutene permeability ratio of 100 may be achieved [22]. One of the main disadvantages of carbon membranes is their incompatibility for ODH, where DH and oxidation are directly coupled, i.e., carried out over the same catalytic bed. 

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