Dear All,
I am in a project to select a gas treatment unit to process a stream of 0,5MMSCF of gas and almost 60%v of h2s, 20%v of H and no CO2 present, to produce a sweet gas with 150 ppm of h2s. The stream is available at a pressure of 100 psig and at ambient temperature (85°F approx.)
I had review all the technologies availables to treat sour gas but I could not find a precise operating conditions and h2s concentrations that could manage each process.
It is understood that absorption process are performed at high pressure, but:
For chemical absorption I have found that could operate from 60 to 2000 psig and up to 70%v of h2s concentration or a partial pressure of h2s of 80 psia in the feed gas, so I would like a more realistic numbers because is a big range the indicated above.
For physical absorption I have found that the contractor operates at 950-1000 psig and that is suitable for high partial pressure of the acid gas (more than 50 psia), but this could be achieved by a high total pressure or a high concentration (Pa=xaPt), so my question is what is more important the partial pressure or the total pressure for the contractor, because in my case I have an stream with a high concentration of H2s (Partial pressure is 60 psig) but the stream is at a low pressure, so I would need to compress the stream if I would like to use this type of technology?.
Thanks in advance