The Theory of Deaeration

The theory of deaeration stems from Henry’s Law of Partial Pressures.  Henry’s Law states that the solubility of any gas dissolved in a liquid is directly proportional to the partial pressure of the gas above the liquid.  The solubility of oxygen in water decreases as the water temperature increases. However, as the water temperature increases, so does the amount of water vapor in the atmosphere above the liquid. When the water reaches full saturation (boiling point), theoretically there is zero oxygen left in the water. In conclusion, due to these physical characteristics, oxygen can be removed from water by raising the temperature and reducing the concentration in the atmosphere above the water.

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