Pressure and temperature swing adsorption and temperature...

B - Operations – Transporting – 01 – D

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B01D 53/047 (2006.01)

Patent

CA 2203406

A method is provided for separating one or more volatile contaminant components from a gas using a pressure and temperature swing adsorbent filtration filter bed system containing three or more layers of adsorbent materials characterised in that the layers comprise a first layer of adsorbent material, a second layer of dessicant material and a third layer of material capable of adsorbing contaminants that are not retained by the first layer. Preferably the third layer is capable of adsorbing contaminants of relatively low boiling point, e.g. of boiling point less than 50 ~C, and preferably comprises a microporous adsorbent. The second layer of dessicant material preferably comprises a zeolite.

On décrit un procédé destiné à séparer d'un gaz un ou plusieurs constituants de contaminants volatils, à l'aide d'un système de filtration à lit filtrant, par adsorption modulée en pression et en température, lequel système comprend trois couches ou davantage de matériaux adsorbants et est caractérisé en ce que ces couches sont composées d'une première couche de matériau adsorbant, d'une seconde couche de matériau déshydratant et d'une troisième couche de matériau pouvant adsorber des contaminants qui ne sont pas retenus par la première couche. De préférence, la troisième couche est susceptible d'adsorber des contaminants possédant un point d'ébullition relativement bas, par exemple inférieur à 50~ C, et elle comprend idéalement un matériau adsorbant microporeux. La seconde couche de matériau déshydratant comprend, de préférence, une zéolite.

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