Coated membranes for enthalpy exchange and other applications

B - Operations – Transporting – 01 – D

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Details

B01D 71/06 (2006.01) B01D 67/00 (2006.01) C08J 7/04 (2006.01) F24F 3/147 (2006.01) F24F 12/00 (2006.01) F28F 13/04 (2006.01) F28F 13/18 (2006.01) F28F 17/00 (2006.01) F28F 21/06 (2006.01)

Patent

CA 2761826

Coated membranes comprise a porous desiccant-loaded polymer substrate that is coated on one surface with a thin layer of water permeable polymer. Such membranes are particularly suitable for use in enthalpy exchangers and other applications involving exchange of moisture and optionally heat between gas streams with little or no mixing of the gas streams through the membrane. Such membranes have favorable heat and humidity transfer properties, have suitable mechanical properties, are resistant to the crossover of gases when the membranes are either wet or dry, and are generally low cost.

L'invention porte sur des membranes revêtues comprenant un substrat polymère chargé de dessicatif poreux qui est appliqué en revêtement sur une surface comprenant une couche mince de polymère perméable à l'eau. De telles membranes sont particulièrement appropriées pour être utilisées dans des roues dessicantes et d'autres applications mettant en jeu l'échange d'humidité et éventuellement de chaleur entre des courants gazeux avec peu ou pas de mélange des courants gazeux à travers la membrane. De telles membranes ont des propriétés avantageuses de transfert de chaleur et d'humidité, ont des propriétés mécaniques appropriées, sont résistantes au passage de gaz lorsque les membranes sont soit mouillées soit sèches et sont généralement peu onéreuses.

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