[NonLinear]

Hey NNB,

Let me know if you happen across a good way to remove lots of H2S from a gas stream that also contains some oxygen and some benzene...

The nonregenerative stuff will cost too much, and have too many trucks coming and going. The oxygen attacks the amine systems, and makes them unviable. The oxygen removal systems are usually catalytic, and the sulphur poisons them. And the membranes are intolerant of the benzene. Seems as if benzene likes to attack cellulose acetate.

[NicknamedBob]

The first thing that comes to mind is to freeze out the Hydrogen Sulfide by using liquid Nitrogen. The benzene would also be removed at a higher temperature.

If H₂S is your only problem, you could then go on to treat the other gases.

[NicknamedBob]

Here perhaps is another option.