Abstract: Hydrogen selective coatings, coated articles and methods for their formation and for hydrogen separation or purification. The coatings are formed by atomic layer deposition of suitable metal oxides with desirable hydrogen activation energy or hydrogen flux, e.g., silicon dioxide, and can be borne on a nonporous, thin-film metal or cermet substrate, e.g., a palladium sheet or layer. The coated substrate may include a porous support for the sheet or layer. The coated article may be used as a purification membrane and the coating can protect the metal layer from contaminants in the gas or process stream from which hydrogen is being purified. In some embodiments, the coated article can provide such protection at elevated temperatures in excess of 300° C.; and in other embodiments, can provide protection at temperatures in excess of 600° C. and even in excess of 800° C.

Abstract: Hydrogen selective coatings, coated articles and methods for their formation and for hydrogen separation or purification. The coatings are formed by atomic layer deposition of suitable metal oxides with desirable hydrogen activation energy or hydrogen flux, e.g., silicon dioxide, and can be borne on a nonporous, thin-film metal or cermet substrate, e.g., a palladium sheet or layer. The coated substrate may include a porous support for the sheet or layer. The coated article may be used as a purification membrane and the coating can protect the metal layer from contaminants in the gas or process stream from which hydrogen is being purified. In some embodiments, the coated article can provide such protection at elevated temperatures in excess of 300° C.; and in other embodiments, can provide protection at temperatures in excess of 600° C. and even in excess of 800° C.

Abstract: A device for producing medical grade water in spacecrafts has a heat exchange unit which initially heats a water supply before being channeled to a membrane filter module which separates the water supply into liquid retentate and purified gaseous permeate.

Abstract: A humid gas stream is dehumidified by bringing that stream into contact with the front surface of a hydrophilic capillary condenser layer that captures the water and moves it adjacent the rear surface of the capillary layer. A semi-permeable collodion membrane, is disposed on the rear capillary surface of the condenser layer, and an osmotic fluid, such as glycerol, is disposed adjacent the collodion membrane. An osmotic driving force, resulting from a water concentration gradient across the collodion membrane, transports the condensed water from the condensing layer through the thickness of the membrane and into an osmotic fluid. The collodion membrane also inhibits the osmotic fluid from flowing into the condenser layer.

Abstract: A humid gas stream is dehumidified by bringing that stream into contact with the front surface of a hydrophilic capillary condenser layer that captures the water and moves it adjacent the rear surface of the capillary layer. A semi-permeable collodion membrane, is disposed on the rear capillary surface of the condenser layer, and an osmotic fluid, such as glycerol, is disposed adjacent the collodion membrane. An osmotic driving force, resulting from a water concentration gradient across the collodion membrane, transports the condensed water from the condensing layer through the thickness of the membrane and into an osmotic fluid. The collodion membrane also inhibits the osmotic fluid from flowing into the condenser layer.