Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1993-11-03
1995-05-02
Tung, T.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
20415318, 20415322, 204421, 204424, 204427, G01N 27419
Patent
active
054116449
ABSTRACT:
A conduit defined by an oxygen ion permeable wall formed of zirconia or other materials and having gas permeable electrodes disposed on an inner and outer surface of the wall. The electrodes are configured to form two oxygen pumps that share an electrode on the inner surface in order to minimize interference with gas flowing through the conduit, yet allow a number of operations to be performed on the gas as it flows. The conduit can be used as a getter for removal of oxygen from even reactive gases. The conduit can also be used as a pump for injecting a known quantity of oxygen to the gas, the oxygen supplied from air outside the conduit. The upstream pump can be used as a getter and the downstream pump for oxygen injection, thereby providing a known concentration of oxygen gas or oxidants, such as water vapor, in the gas exiting the conduit. The conduit can contain a pair of sensor electrodes on the inner and outer surface downstream of the other electrodes. The sensor electrodes can determine when the oxygen removed from the gas is equal to the known quantity of oxygen injected, providing a means for measuring the concentration of oxidants in the gas.
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Fouletier et al., "Electrically Renewable and Controllable Oxygen Getter", Vacuum, vol. 25, pp. 307-314, 1975 month unavailable.
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