Methods for removing hydrogen sulfide from naphtha
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After hydrodesulfurization of naphtha, H2S gas remains; it is generally absorbed using an alkaline solution, but treating it with an alkaline solution is rather complicated. Are there any other ways to remove hydrogen sulfide? Marine friends, please discuss this. Thank you!
At this level for now, there are no advanced tricks.
Alkali solution absorption desulfurization is a mature technology with a large processing capacity and high efficiency
Currently, alkali solutions are generally used to remove hydrogen sulfide from gasoline.
I guess there’s no other good way; currently our units are also being used for naphtha desulfurization.:lol
Naphtha coming from the upstream unit enters desulfurization towers 1# and 2# from the bottom via shut-off valves (utilizing the existing equipment: tower 1# has an effective volume of 7.5 m3, while tower 2# has an effective volume of 28 m3). Tower 1# is filled with desulfurizing agent 1 at the bottom, followed by desulfurizing agent 2 on top of it; tower 2# is filled entirely with desulfurizing agent 3). This allows the naphtha to come into contact with desulfurizing agent 1, with the aim of converting some of the organic sulfur in the naphtha into hydrogen sulfide. The mixture then passes through desulfurizing agent 2 to remove some of the sulfides that are easily removed from the naphtha components. Finally, it passes through desulfurizing agent 3, where higher molecular weight sulfur compounds such as thiols are converted into disulfides, thereby ensuring that the exported naphtha meets the requirements for passing the Driscoll test and having acceptable copper sheet corrosion resistance. (Using a series-parallel setup, one can be in use while the other is on standby)