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US 11,452,970 B2Granted
Calcium cobalt zirconium perovskites as oxygen-selective sorbents for gas separation
AssigneeResearch Triangle Institute
InventorsQinghe Zheng, Marty Lail, Shaojun Zhou
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Abstract
The present disclosure provides methods to use calcium cobalt zirconium perovskites as oxygen-selective sorbents for the separation of oxygen from a gas mixture such as air. Systems and high temperature oxygen detectors are also provided. In a preferred embodiment, the perovskite is configured as a membrane.
Claims20
A method for separating oxygen from a gas mixture which comprises
- (a) preparing an oxygen-depleted perovskite from a perovskite having the formula CaCo1-xZrxO3-δ wherein x is a number defined by 0.02≤x≤0.98;
- and δ is a number defined by 0.0≤δ≤1.0;
- (b) contacting the oxygen-depleted perovskite under conditions such that the oxygen-depleted perovskite binds the oxygen from the gas mixture and generates an oxygenated perovskite with bound oxygen;
- (c) treating the oxygenated perovskite under suitable conditions so as to regenerate the oxygen-depleted perovskite, release the bound oxygen from the oxygenated perovskite, and generate separated oxygen.
1 more element
A system for the separation of oxygen from a gas mixture, the system comprising:
- (a) a reactor configured to prepare an oxygen-depleted perovskite from a perovskite having the formula CaCo1-xZrxO3-δ wherein x is a number defined by 0.02≤x≤0.98;
- and δ is a number defined by 0.0≤δ≤1.0;
- (b) a sorbent/membrane configured to contact the oxygen-depleted perovskite with the gas mixture to generate an oxygenated perovskite;
- (c) a temperature-swing, pressure-swing, or combined apparatus to treat the oxygenated perovskite to release the oxygen and generate an oxygen-depleted perovskite;
- and
- (d) a housing configured to collect the released oxygen.
3 more elements
A detector for oxygen in a gas mixture which comprises:
- (a) an oxygen-depleted perovskite from a perovskite having the formula CaCo1-xZrxO3-δ wherein x is a number defined by 0.02≤x≤0.98;
- and δ is a number defined by 0.0≤δ≤1.0;
- (b) a sorbent/membrane configured to contact the oxygen-depleted perovskite with the gas mixture and, if oxygen is present, to generate an oxygenated perovskite;
- and
- (c) a apparatus for detecting the oxygenated perovskite if present.
2 more elements
Dependencies are inferred from the claim text.