The oxygen storage method for subsequent use covers many approaches, including high pressure in oxygen tanks, cryogenic, oxygen-rich compounds and reaction mixtures, and chemical compounds that reversibly release oxygen during heating or pressure changes. O 2 is the second most important industrial gas.
Video Oxygen storage
Air
Air is the most common source and source of oxygen, containing 20.8%. This concentration is sufficient for many purposes, such as burning lots of fuel, corrosion of many metals, and animal breathing. Most humans can function at rest with a 15% oxygen level at one atmospheric pressure; fuels such as methane can be burned up to 12% oxygen in nitrogen.
The small space measuring 10 meters 3 has 2.08 meters 3 (2080 liters) or 2.99 kg of oxygen that will occupy 2.62 liters if it is liquid.
Maps Oxygen storage
High pressure
Pressure oxygen tank up to 200 bar (3000 psi) is used for industrial process including steel and monet manufacture, welding and cutting, medical breathing gas, dive and emergency backup on the aircraft.
A small steel tank with a capacity of 16 liters of water with a working pressure of 139 bar (2015 psi) holds about 2150 liters of gas and weighs 28 kilograms (62 pounds) empty. 2150 liters of oxygen weighs about 3 kilograms (6.6 pounds)
Cryogenic
Liquid oxygen in cryogenic storage dewars (vacuum thermos) is used in the aerospace, submarine and gas industries.
Chemical oxygen generator
Chemical oxygen generators store oxygen in their chemical composition, and can only be used once.
Oxygen wax contains a mixture of sodium chlorate and iron powder, which when ignited with a smolder of about 600 ° C (1.112 ° F) and produces sodium chloride, iron oxide, and oxygen, about 270 liters per kg of mixture.
Some commercial airlines use emergency oxygen generators containing a mixture of sodium chlorate (NaClO 3 ), 5 percent barium peroxide (BaO 2 ) and 1 percent potassium perchlorate (KClO 4 ), which, after ignition, reacts releasing oxygen for 12 to 22 minutes while the unit reaches 500 Ã, Â ° F (260Ã, Â ° C).
The Vika oxygen-generating system, used on Mir and later the International Space Station under the appointment of NASA Solid Fuel Oxygen Generator (SFOG) is based on lithium perchlorate, which releases about 60% by weight in oxygen. Of all perchlorates, lithium perchlorate has the highest oxygen to weight and oxygen to volume ratio, except expensive and toxic beryllium dihydchlorate. The Vika system uses a tube containing about 1 liter (2.4 kg) of perchlorate to produce 600 liters (0.86 kg) of oxygen, enough for one person for a day.
Chemical oxygen generators containing potassium superoxide are used on the Soyuz spacecraft and in some mine safety Self-Resained Self-Rescue (SCSR) devices; KO 2 reacts with H 2 O and CO 2 to produce oxygen, and 0.38 kg of oxygen is generated per kg of superoxide.
Tetramethylammonium ozonide (NO 3 ) is proposed as an oxygen source for the generator because of its low molecular weight, to 39% oxygen.
Reversible chemical absorber
Scientists at the University of Southern Denmark publish a paper on oxygen storage by chemisorption. Two molecules of dioxygen are deposited into the crystal salt (2b/o> 2 2 2 amino-1,4-benzenedicarboxylato) (NO 3 ) 2 Ã, Â · 2H 2 O. at 35 Celsius, and released by heating up to 100 Celsius. "Bpbp" is 2,6-bis (N, N-bis (2-pyridylmethyl) aminomethyl) -4- tert -butylphenolato.
A cobalt function analogy bound to its organic molecules is made for iron and copper functions in metalloproteins used for respiration by animals. The anion nitrate in the crystal is interchangeable with neutral dioxygen but remains in the crystal; anions other than nitrates work together and exchange oxygen faster. 10 liters of crystals "enough to suck up all the oxygen in the room", three times more oxygen than equivalent sized steel tanks.
See also
- Cryogenic oxygen generator
References
Source of the article : Wikipedia
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