Separation of krypton gas from xenon gas using natural clinoptilolite
| DWPI Title: Separating krypton gas from xenon gas by selectively adsorbing krypton gas, involves providing vessel comprising krypton adsorbent bed comprising natural clinoptilolite adsorbent, and exposing feed gas comprising krypton gas and xenon gas to adsorbent bed to form xenon enriched gas raffinate product |
| Abstract: A system and method for separating Kr gas from Xe gas utilizing natural clinoptilolite. The method includes separating Kr gas from Xe gas by selectively adsorbing Kr gas. The method includes providing a vessel comprising a Kr adsorbent bed comprising a natural clinoptilolite adsorbent. A feed gas comprising Kr gas and Xe gas is exposed to the Kr adsorbent bed for a residence time to selectively adsorb sufficient Kr gas from the feed gas to form a Xe enriched gas raffinate product. The Xe enriched gas raffinate product is removed from the vessel. Thereafter, the Kr adsorbent bed is regenerated to release a Kr enriched gas extract product. |
| Use: Method for separating Kr gas from Xe gas by selectively adsorbing Kr gas. |
| Advantage: The Xe, Kr and Ar gas adsorption isotherms at 27 °C for natural clinoptilolite powders with differing water contents as determined by different degas temperatures. For powders degassed at room temperature, there is approximately 10-13 wt.% residual water whereas the sample degassed at 350 °C (i.e., dry natural clinoptilolite) removes essentially all the water. In all three cases, Kr adsorbed is greater than Xe and with increasing degas temperature (less water content), Kr adsorption increases significantly whereas Xe adsorption decreases eventually. |
| Novelty: Method for separating krypton (Kr) gas from xenon (Xe) gas by selectively adsorbing Kr gas, involves providing a vessel comprising a Kr adsorbent bed comprising a natural clinoptilolite adsorbent, exposing a feed gas comprising Kr gas and Xe gas to the adsorbent bed for a residence time to selectively adsorb sufficient Kr gas from the feed gas to form a Xe enriched gas raffinate product, removing the Xe enriched gas raffinate product from the vessel, and thereafter regenerating the Kr adsorbent bed to form a Kr enriched gas extract product. |
| Filed: 6/30/2022 |
| Application Number: US17854307A |
| Tech ID: SD 16011.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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