High temperature gas processing system and method for making the same
AssigneeVolt Research
InventorsAjit Y. SANE, Thomas L. CABLE
Life of this patent
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Abstract
A membrane for use in a high temperature gas processing system and method for making the same. The membrane includes a dense, gas impermeable layer and a first and second porous layer, wherein each of the first and second porous layers is a ceramic oxide material having a non-symmetrical load bearing skeleton of a plurality of pores having a graded porosity. Each porous layer provides a reduction of an oxygen partial pressure gradient across the dense layer and reduces resultant stresses in the dense layer that are small compared to its strength thereby improving long term mechanical durability of the dense layer.
Claims25
A membrane for use in a high temperature gas processing system, the membrane comprising:
- a dense, gas impermeable layer, wherein the dense layer is a ceramic oxide material that conducts ions, electrons, and combinations thereof;
- a first and second porous layer, wherein each of the first and second porous layers is a ceramic oxide material having a non-symmetrical load bearing skeleton of a plurality of pores having a graded porosity, and wherein the dense layer is positioned between the first and second porous layers such that a first gas is contactable with the first porous layer of the membrane and a second gas is contactable with the second porous layer, wherein each porous layer provides a reduction of an oxygen partial pressure gradient across the dense layer and reduces resultant stresses in the dense layer that are small compared to its strength thereby improving long term mechanical durability of the dense layer.
A method of processing at least two gasses in a gas processing system, the method comprising the steps of:
- providing a membrane including:
- a dense, gas impermeable layer, wherein the dense layer is a ceramic oxide material that conducts ions, electrons, and combinations thereof;
- a first and second porous layer, wherein each of the first and second porous layers is a ceramic oxide material having a non-symmetrical load bearing skeleton of graded porosity, and wherein the dense layer is positioned between the first and second porous layers;
- contacting the first porous layer with a first gas and the second porous layer with a second gas, wherein each porous layer provides a reduction of an oxygen partial pressure gradient across the dense layer and reduces resultant stresses in the dense layer that are small compared to its strength thereby improving long term mechanical durability of the dense layer;
- and
- producing a product selected from the group consisting of synthesis gas, hydrogen gas, and carbon monoxide.
Dependencies are inferred from the claim text.