50 MM scud of a natural gas containing 0.5% H_2S and 2% CO_2at 900 psia and 90 d

Question

50 MM scud of a natural gas containing 0.5% H_2S and 2% CO_2at 900 psia and 90 degree F is to be sweetened using an aqueous amine solution. The lean amine solution is to be cooled to 110 degree F before being introduced at the top of the absorber. The amount of stripping steam in the still (stripper) is I lb per US gallon of the amine solution. The sweet exit gas is assumed free of sour gas, determine: The required circulation rate of a 15% MEA solution assuming to approach 70% to equilibrium in the rich solution leaving the bottom of the contractor. The required circulation rate of a 20% DEA solution assuming 0.01 mole h_2S/mol DEA and 0.03 mole CO_2/mole DEA in the lean amine solution.

Explanation / Answer

A solvent screening set up was used to find the co2 loading for 30 different aqueous amine solutions ata pressure of 1b with feed gas containing 15 vol % co2 and 85 vol% N2 at 313.15k to provide reliable absorber parameters. the structures of various amines were tested and the S.S.S results showed that hexametylenediamine (HMD) has higher co2 loading at 1.35 moles of co2 /mole of amine , and triethanolamine (TEA) has the lowest at 0.39 mole of CO2 /mole of amine heat of absorption indicates that MDEA has the lowest and HMD has the highest at - 52.51 KJ/mole of co2 and -9839 KJ/mole of co2 respectively.

Related Questions

Navigate

• Browse (All)
• Browse 5
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.