Degásing

Degassing is a process that removes dissolved gases from a liquid. This is often necessary in various industries and scientific applications. For example, in the brewing and winemaking industries, degassing helps to eliminate carbon dioxide that can impart a sour or stale taste. In the semiconductor industry, pure water used for cleaning silicon wafers must be degassed to prevent microscopic bubbles from forming on the surface, which can lead to defects in the chips.

Various methods are employed for degassing. Heating a liquid can reduce the solubility of gases, causing them to escape. Mechanical agitation, such as stirring or shaking, can also facilitate the release of dissolved gases by increasing the surface area exposed to the atmosphere. Vacuum degassing is a common technique where the liquid is subjected to reduced pressure. This lowers the boiling point of the dissolved gases, allowing them to vaporize and be removed. Ultrasonic degassing uses high-frequency sound waves to create cavitation bubbles, which then collapse and release dissolved gases. The choice of degassing method depends on the specific liquid, the type and amount of gas to be removed, and the desired purity of the final product.