Membrane separations, multistage example

An example of a multistage gas separation membrane process is given in Figure 7.1 for natural gas treating [Spillman, 1989]. It is generally accepted that for a gas separation membrane to be cost effective, a separation factor of at least 5-10 (sometimes even higher) will be required. 

Examples of splitters are devices in which nonequilibrium separations are achieved by means of membranes, electrical fields, temperature changes, and others. The splitter can also be used to model any multistage chemical separator where stage details are not of interest. 

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