H2S is scrubbed from refinery gases by absorption using ________________________?
Correct answer: B. Ethanol amine
- A. Dilute H2SO4
- B. Ethanol amine
- C. Chilled water
- D. Tri-butyl phosphate
Explanation
Hydrogen sulphide is an acidic gas and is readily absorbed by aqueous ethanolamine solutions such as MEA or DEA, which can later be regenerated. Water absorbs less H2S and the other listed solvents are not the standard refinery absorbents.
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