Cl2 is dried using concentrated sulfuric acid; why can’t H2 be dried the same way?
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Cl2 is dried using concentrated sulfuric acid; why can’t H2 be dried the same way?
Cl2 is dried using concentrated sulfuric acid; why can’t H2 be dried the same way? ------Hydrogen is also an option; however, the trace amount of water present in hydrogen does not affect subsequent processes, so there is no need for additional investment. Concentrated sulfuric acid is used with chlorine because wet chlorine causes corrosion to carbon steel equipment, which is why strict requirements are placed on moisture levels.
This post was last edited by Yann on 2015-10-23 at 15:18. I came across in a document that H2 uses solid alkali (which, as I understand it, refers to solid NaOH) for dehydration; if solid alkali is used for this purpose, the cost must be quite high as well!!
Hydrogen does not need to be dried; after being cooled by chilled water, its moisture content is very low, so it will not have an impact on downstream processes
This post was last edited by qugd on 2015-11-3 14:59. Drying chlorine is done to reduce or eliminate the corrosive effect of wet chlorine. Pressurized cooling cannot conveniently separate water from chlorine, as chlorine also liquefies; therefore, chlorine is dried using chemical absorption. Sulfuric acid is used as a desiccant; firstly, it is a liquid that can be handled using a drying tower, and secondly, its cost is relatively low. Hydrogen can be dried through other cheaper methods, such as pressurized cooling.
There is absolutely no need for this; even if drying to a very low level is required, concentrated sulfuric acid is not an economical solution, as the resulting dilute sulfuric acid becomes increasingly difficult to handle