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By 1988, 78% of South Korean households used yeontan, but this fell to 33% by 1993 as people switched to oil and gas boilers, and was estimated to be used by just 2% of households by 2001. [1] The boilers reduced the risk of carbon monoxide poisoning , which was a major cause of death in coal-heated houses.
Compressed argon gas is allowed to expand, to cool the seeker heads of some versions of the AIM-9 Sidewinder missile and other missiles that use cooled thermal seeker heads. The gas is stored at high pressure. [49] Argon-39, with a half-life of 269 years, has been used for a number of applications, primarily ice core and ground water dating.
A gas regulator attached to a nitrogen cylinder. Industrial gases are the gaseous materials that are manufactured for use in industry.The principal gases provided are nitrogen, oxygen, carbon dioxide, argon, hydrogen, helium and acetylene, although many other gases and mixtures are also available in gas cylinders.
A cryogenic gas plant is an industrial facility that creates molecular oxygen, molecular nitrogen, argon, krypton, helium, and xenon at relatively high purity. [1] As air is made up of nitrogen, the most common gas in the atmosphere, at 78%, with oxygen at 19%, and argon at 1%, with trace gasses making up the rest, cryogenic gas plants separate air inside a distillation column at cryogenic ...
The stages of blowing remove carbon by the combination of oxygen and carbon forming CO gas. 4 Cr (bath) + 3 O 2 → 2 Cr 2 O 3 Cr 2 O 3(slag) + 3 C (bath) → 3 CO (gas) + 2 Cr (bath) To drive the reaction to the forming of CO, the partial pressure of CO is lowered using argon or nitrogen. Since the AOD vessel is not externally heated, the ...
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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.
The gas used is usually inert, or of a nature that protects the integrity of the packaged goods, inhibiting unwanted chemical reactions such as food spoilage or oxidation. Some may also serve as a propellant for aerosol sprays like cans of whipped cream. For packaging food, the use of various gases is approved by regulatory organisations. [1]