Hydrogen purity for ion-exchange membrane caustic soda? Can it reach 99.9%?
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This post was last edited by sunjl1981 on 2013-1-6 at 22:49. Due to the limitations in the precision of the instruments we have here, we no longer conduct such tests. What methods do the companies where you work use to measure hydrogen purity? What is the content? ， ， -
Reply 1# wenyuyu: In PVC production, the purity of hydrogen generally can reach 99.5%; the main impurities are oxygen and nitrogen. In many cases, online hydrogen analyzers combined with chromatography are used to analyze the purity of hydrogen
The purity of our dry hydrogen can reach 99.76%
ours can reach almost 99.9%; I think ICP is used for that
Ours is also around 99.7%
It’s funny – ICP can actually be used to analyze the purity of hydrogen. Could you explain the detailed method so that I can learn something new?
The hydrogen gas produced in the cathode chamber of ion-exchange membrane caustic soda may contain small amounts of oxygen and nitrogen due to air contamination at first; after operating for some time, it becomes almost pure hydrogen, although its humidity is relatively high. After dehydration, the purity of the hydrogen should reach 99.9%. The method for analyzing the purity of hydrogen is to use chromatography to determine the impurity gases present in it, such as small amounts of oxygen, nitrogen, carbon dioxide, water (measured by other methods), etc.
With my ion exchange membrane, the purity of dry hydrogen gas generally reaches over 99.8%, and 99.9% is also common; this is determined using the combustion method
Absolutely, the purity of the hydrogen main pipe in our system is consistently maintained at over 99.9%, as determined by ICP analysis.
ICP 99％.................