Separation of krypton from carbon dioxide and oxygen with molecular sieves

Conference · Thu Jan 01 00:00:00 EST 1976

OSTI ID:7183708

Forsberg, C W

Molecular sieves were investigated to separate 1 percent mixtures of krypton in gas streams of a few percent oxygen and 90+ percent carbon dioxide. Such a system will be required to concentrate the krypton gas between radioactive krypton off-gas cleanup systems such as KALC (Krypton Absorption in Liquid Carbon Dioxide) and any krypton gas bottling station. Linde 5A molecular sieves were found capable of selectively removing the CO/sub 2/ from the gas stream while partially separating the oxygen from the krypton; i.e., effecting a three-component gas separation. This use of molecular sieves differs from standard practice in two respects. First, the bulk of the gas (greater than 90 percent) is removed by molecular sieves rather than the normal practice of using molecular sieves to remove trace impurities. Second, in a single bed two separations occur simultaneously, CO/sub 2/ from other gases and krypton from oxygen. The use of molecular sieves for separating krypton and carbon dioxide is superior to alternatives such as CO/sub 2/ freezeout and chemical traps when there are only moderate gas flows and there is a need for very high reliability and ease of maintenance.

• Research Organization: Oak Ridge National Lab., Tenn. (USA)
• OSTI ID: 7183708
• Report Number(s): CONF-760822-3; TRN: 76-018073
• Resource Relation: Conference: 14. US ERDA air cleaning conference, Sun Valley, ID, USA, 2 Aug 1976
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
CARBON DIOXIDE
ADSORPTION
FUEL REPROCESSING PLANTS
OFF-GAS SYSTEMS
KRYPTON
OXYGEN
RADIOACTIVE WASTE PROCESSING
GASEOUS WASTES
MOLECULAR SIEVES
ADSORBENTS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
MANAGEMENT
NONMETALS
NUCLEAR FACILITIES
OXIDES
OXYGEN COMPOUNDS
PROCESSING
RARE GASES
SORPTION
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
052001* - Nuclear Fuels- Waste Processing
050800 - Nuclear Fuels- Spent Fuels Reprocessing