Gas separation membranes for separating components from a gas stream are gaining increasing popularity. They are often used to separate CO
2 from hydrocarbon gases, hydrogen and ammonia. Membranes are simple, modular in nature, have no moving parts; and, can package a high membrane area in a small volume. Most membranes are packaged commercially in either a spiral-wound or hollow-fiber configuration. All membranes act as very fine filters and trap particles and other contaminants. (
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Once they are plugged, even partially, their separation efficiency (directly dependent on the available porous volume) is decreased. In addition, membranes themselves are expensive and care must be taken to protect them from contaminants which have a serious and irreversible effect on membrane life.
