2 replies to this topic

[markymarks]

So I have a single vent on top of a 98% sulphuric acid storage tank that has Hydrogen gas coming out of it (for some reason).

I need to find the weight fraction of Hydrogen in the vapour space so I can calculate the hydrogen concentration at the vent. How do I do this?

[thorium90]

Hmm, acids reacts with metals to produce hydrogen... I think I would be more worried about hydrogen gas coming out of an acid tank.

[Art Montemayor]

Is this a real life situation?  What you are naively describing is an industrial hazardous and dangerous situation.  Please communicate all the facts.  As professional engineers we can morally allow you to operate a tank under the situation you describe without advising you of the impending dangers.  Therefore, unless you are a young, inexperienced student, don't use immature, layman's language like "So I have a single vent ......"   The more accurate and specific the advice.

 

The continuous venting of hydrogen gas from an acid tank is NOT a normal - nor acceptable - situation.  As thorium90 states, this hydrogen may be originating from a reaction between the acid and the tank material.  Use practical horse sense:  if your tank material is reacting to produce hydrogen, then your tank's material is being consumed - while the tank contains acid!   The end result of such a scenario is that your tank will ultimately rupture from excessive depletion of the parent metal and the consequences are almost fatal to the surrounding area.

 

If this is a real situation, please cooperate and give all your basic data and allow us to help you out.  If this is not a real situation, please post this topic in the Student Forum as a homework problem.