Reactive membrane for filtration and purification of gases of impurities and method utilizing the same
AssigneeArizona Board of Regents on Behalf of the University of Arizona
InventorFarhang F. Shadman
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Abstract
A reactive membrane for removing impurities, such as water, oxygen and organic compounds, from a gas is provided. The reactive membrane includes a porous inorganic substrate having exposed surfaces and at least one carbon layer, which is modified to present active sites, deposited on the exposed surfaces. The active sites include metal species which are at least partially deoxygenated and are chemically bonded to the carbon layer. Methods of forming the reactive membrane and of removing impurities from a gas with the membrane are also provided.
Claims58
A method for removing heterogeneous and homogeneous impurities from a gas comprising:
- (a) passing the gas, which includes heterogenous and homogenous impurities, through a reactive membrane comprising a porous inorganic substrate and at least one carbon layer supported by the porous inorganic substrate, the carbon layer being modified to present active sites which include metal species chemically bonded to the carbon layer and serving as a scavanger;
- and
- (b) interacting the homogeneous impurities with the active sites, thereby removing the homogeneous impurities from the gas.
A method for removing homogeneous or a combination of homogeneous and heterogeneous impurities from a gas comprising:
- (a) passing gas containing at least one homogeneous impurity or a combination of homogeneous and heterogeneous impurities through a reactive membrane which comprises a porous inorganic substrate and a carbon layer supported by substantially all of the porous inorganic substrate, the carbon layer being modified to present active sites which include metal species chemically bonded to the carbon layer and serving as a scavenger;
- (b) filtering at least a portion of any heterogeneous impurities from the gas;
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- (c) interacting at least a portion of the homogeneous impurities with the active sites, thereby removing said portion of homogeneous impurities from the gas.
Dependencies are inferred from the claim text.