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  2. Oxygen scavenger - Wikipedia

    en.wikipedia.org/wiki/Oxygen_scavenger

    There are many types of oxygen absorbers available to cover a wide array of applications. [2] [3] The components of an oxygen absorber vary according to intended use, the water activity of the product being preserved, and other factors. Often the oxygen absorber or scavenger is enclosed in a porous sachet or packet but it can also be part of ...

  3. Self-contained breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/Self-contained_breathing...

    To reduce pressure buildup from use, a pressure-relief valve with saliva trap is included. Closed-circuit SCBAs are also noticeably smaller than open-circuit ones. [9] Self-contained self-rescue devices are also closed-circuit SCBAs, working on the same principles, being designed for emergency use in mines, and lasting about one hour. [9]

  4. Scavenger (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Scavenger_(chemistry)

    Their use is wide-ranged: In atmospheric chemistry , the most common scavenger is the hydroxyl radical , a short-lived radical produced photolytically in the atmosphere. It is the most important oxidant for carbon monoxide , methane and other hydrocarbons , sulfur dioxide , hydrogen sulfide , and most of other contaminants, removing them from ...

  5. File:% oxygen saturation vs depth.pdf - Wikipedia

    en.wikipedia.org/wiki/File:%_oxygen_saturation_vs...

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  6. Oxygen concentrator - Wikipedia

    en.wikipedia.org/wiki/Oxygen_concentrator

    An oxygen concentrator takes in air and removes nitrogen from it, leaving an oxygen-enriched gas for use by people requiring medical oxygen due to low oxygen levels in their blood. [4] Oxygen concentrators provide an economical source of oxygen in industrial processes, where they are also known as oxygen gas generators or oxygen generation plants.

  7. Rebreather - Wikipedia

    en.wikipedia.org/wiki/Rebreather

    A store of oxygen, usually as compressed gas in a high pressure cylinder, but sometimes as liquid oxygen, that feeds gaseous oxygen into the ambient pressure breathing volume, either continuously, or when the user operates the oxygen addition valve, or via a demand valve in an oxygen rebreather, when the volume of gas in the breathing circuit ...

  8. Pressure swing adsorption - Wikipedia

    en.wikipedia.org/wiki/Pressure_swing_adsorption

    for oxygen: up to 1500 Nm 3 /h with a purity between 88% and 93%. [3] In the frame of carbon capture and storage (CCS), research is also currently underway to capture CO 2 in large quantities from coal-fired power plants prior to geosequestration, in order to reduce greenhouse gas production from these plants. [4] [5]

  9. Air separation - Wikipedia

    en.wikipedia.org/wiki/Air_separation

    A nitrogen generator Bottle of 4Å molecular sieves. Pressure swing adsorption provides separation of oxygen or nitrogen from air without liquefaction. The process operates around ambient temperature; a zeolite (molecular sponge) is exposed to high pressure air, then the air is released and an adsorbed film of the desired gas is released.

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