Calculation of moisture in alkali vapor
Thread Content
Based on the alkali concentration and the vapor pressure of the corresponding sodium hydroxide solution, can it be calculated how much alkali and how much water is present in the alkali vapor?
It’s not possible, because caustic soda is not a volatile solute, and no partial pressure data can be found in the saturated vapor pressure of solutes. Theoretically, steam does not contain alkalis; the presence of alkalis in the steam is due to liquid droplets of alkalis being entrained in the flowing gas, and these can be removed using a defoamer.
What was said on the 2nd floor is right! The moisture content in the alkali vapor should be determined by dividing the saturated vapor pressure of water at that temperature by the vapor pressure at the surface of the caustic soda solution