Discussion on the ammonia content in the circulating hydrogen of hydrogenation units
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Our company has a hydrogenation unit, and recently we monitored the ammonia content in the circulating hydrogen system; using detection tubes, we found that it remained at around 100–200 mg/m3. I find this strange, as we keep the water volume at a high level; theoretically, there shouldn’t be any ammonia in the system. After all, 700 cubic feet of ammonia can dissolve in each cubic foot of water. So is it our detection methods that are incorrect, or is there indeed some residual ammonia in the system? I hope colleagues working in the hydrogen sector can help diagnose this issue – is there any ammonia present in the recycled hydrogen in your systems? ?
Personally, I think it’s a matter of saturation vapor pressure equilibrium; no matter how high the solubility is, there is still a vapor-liquid equilibrium. It’s not possible for there to be no gas phase and only a liquid phase just because of high solubility.