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  2. Rebreather - Wikipedia

    en.wikipedia.org/wiki/Rebreather

    Another method of carbon dioxide removal occasionally used in portable rebreathers is to freeze it out, which is possible in a cryogenic rebreather which uses liquid oxygen. The liquid oxygen absorbs heat from the carbon dioxide in a heat exchanger to convert the oxygen to gas, which is sufficient to freeze the carbon dioxide.

  3. Vacuum insulated evaporator - Wikipedia

    en.wikipedia.org/wiki/Vacuum_insulated_evaporator

    Diagram showing the components of a VIE system. A photo showing a VIE system. A vacuum insulated evaporator (VIE) is a form of pressure vessel that allows the bulk storage of cryogenic liquids including oxygen, nitrogen and argon for industrial processes and medical applications.

  4. Oxygen breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/Oxygen_Breathing_Apparatus

    [1] The scrubber canister uses potassium superoxide as both a carbon dioxide absorbent and as an oxygen source. A sodium chlorate oxygen candle in the base of the unit generates oxygen on start-up as the canister has to reach a high internal temperature before it will start generating oxygen. The circulation of exhaled air containing carbon ...

  5. Cascade filling system - Wikipedia

    en.wikipedia.org/wiki/Cascade_filling_system

    The second and third tanks will bring the vehicle's tank closer to 3000 psi. The station normally has a compressor, which refills the station's tanks, using natural gas from a utility line. This prevents accidentally overfilling the tank, which could happen with a system using a single fueling tank at a higher pressure than the target pressure ...

  6. Medical gas supply - Wikipedia

    en.wikipedia.org/wiki/Medical_gas_supply

    Medical oxygen storage tanks at the Royal Women's Hospital, Melbourne, Australia. Oxygen may be used for patients requiring supplemental oxygen via mask. Usually accomplished by a large storage system of liquid oxygen at the hospital which is evaporated into a concentrated oxygen supply, pressures are usually around 345–380 kPa (50.0–55.1 psi), [1] [2] or in the UK and Europe, 4–5 bar ...

  7. High altitude breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/High_altitude_breathing...

    Above 15,000 m (49,000 ft), respiration is not possible because the pressure at which the lungs excrete carbon dioxide (approximately 87 mmHg) exceeds outside air pressure. [ citation needed ] Above 19,000 m (62,000 ft), known as the Armstrong limit , exposed fluids in the throat and lungs will boil away at normal body temperature, and pressure ...

  8. Gas cylinder - Wikipedia

    en.wikipedia.org/wiki/Gas_cylinder

    The term cylinder in this context is sometimes confused with tank, the latter being an open-top or vented container that stores liquids under gravity, though the term scuba tank is commonly used to refer to a compressed gas cylinder used for breathing gas supply to an underwater breathing apparatus.

  9. Bottled gas - Wikipedia

    en.wikipedia.org/wiki/Bottled_gas

    carbon dioxide in the form of a soft drink; sulfur trioxide in the form of fuming sulfuric acid; nitrogen dioxide in the form of red-fuming nitric acid; hydrogen chloride in the form of muriatic acid. Note: these four are most often found in containers other than metal bottles, and at low pressure, e.g. 3 to 7 standard atmospheres (300 to 710 ...