摘要:
An adsorbent comprising a zeolite having a pore diameter of not less than 4.5 angstroms and not more than 7.3 angstroms as a principal component, which can adsorb xenon under ordinary temperatures and pressures or under ordinary temperatures and low xenon partial pressure, is used. In the xenon recovery method of the present invention, the adsorbent is communicated with a xenon-containing equipment, and xenon is adsorbed on the adsorbent and xenon is detached from the adsorbent. Thereby, xenon can be recovered, with efficiency, directly from used equipment in which xenon is enclosed under ordinary temperatures and pressures or under ordinary temperatures and low xenon partial pressure.
摘要:
A system for collecting, re-pressurizing, purifying and re-using helium gas used as a carrier gas for a gas chromatograph having a carrier gas inlet and at least one outlet vent, the system including a source of purified helium gas and characterized by: (i) a flexible bladder comprising a bladder interior fluidically coupled to the at least one outlet vent; (ii) a compartment comprising a compartment interior within which the bladder is contained; (iii) a source of pressurized air or gas fluidically coupled to the compartment interior and operable to compress the flexible bladder; (iv) a gas reservoir fluidically coupled to the bladder interior so as to receive the helium bearing gas from the bladder interior; and (v) at least one gas purification module fluidically coupled to the gas reservoir, wherein an output of the at least one gas purification module is fluidically coupled to the carrier gas inlet.
摘要:
Krypton and/or xenon is separated crudely from an oxygen product 800 comprising oxygen and at least one rare gas selected from the group consisting of krypton and xenon in a dephlegmation process in a rare gas recovery system comprising at least one heat exchanger 80. The process is characterised in that the pressure of the oxygen product 800 is increased before being fed to the rare gas recovery system, and in that at least about 50 mol % of said oxygen product 800 is fed to the rare gas recovery system in the gaseous phase. One advantage of a preferred embodiment of the present invention is that it can easily be retrofitted to existing pumped LOX cycle ASUs.
摘要:
The risk of asphyxiation with helium used as a lifting gas for balloons is reduced by providing the helium as a breathable mixture with oxygen and 2 to 5 volume % carbon dioxide.
摘要:
A method and apparatus for the accumulation of hyperpolarized 129 Xe is described. A gas mixture comprising 129 Xe is flowed through a heat exchanger tube from the first end to the second end. Concurrently, the outer surface of the heat exchanger tube is controllably refrigerated, beginning with the second end, to a temperature low enough to freeze the 129 Xe on the inner surface of the heat exchanger tube.
摘要:
L'invention porte sur l'utilisation d'argon gazeux en tant que médicament inhalable destiné à prévenir ou à traiter une neuro-intoxication chez l'homme, en particulier, une neuro-intoxication qui résulte d'un dysfonctionnement cérébral d'un ou plusieurs systèmes à neurotransmetteurs. La proportion volumique d'argon dans le médicament gazeux est comprise entre 15 et 80 %. De préférence, le médicament gazeux est un mélange gazeux binaire constitué d'argon et d'oxygène pour le reste ou un mélange ternaire constitué d'argon, d'azote et d'oxygène.