Oxygen is typically put into a tank by compressing gaseous oxygen or by filling the tank with liquid oxygen, which then converts to gaseous oxygen within the tank as it warms.
Here's a more detailed explanation:
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Compression of Gaseous Oxygen: The most common method involves drawing in ambient air or using an oxygen concentrator (which separates oxygen from the air), filtering out impurities, and then using a compressor to increase the pressure of the oxygen gas. This high-pressure gas is then pumped into the tank. Think of it like inflating a bicycle tire, but on a much larger and more sophisticated scale.
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Filling with Liquid Oxygen: Oxygen can be cooled to its liquid state at extremely low temperatures (-297°F or -182.8°C). In this liquid form, oxygen is much denser, meaning a larger amount of oxygen can be stored in the same volume. Liquid oxygen is produced in specialized facilities. The liquid oxygen is then pumped into the tank. As it warms within the tank, it turns back into gaseous oxygen, filling the tank at a high pressure. This method is used for applications requiring a large volume of oxygen.
- Caution: Liquid oxygen is extremely dangerous and must be handled with extreme care.
In either method, the tank is carefully filled and sealed to prevent leaks and maintain the oxygen's purity. The tanks are typically made of steel or aluminum and are designed to withstand high pressures.
