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| Component | Volume % (varies by field) | |-----------|----------------------------| | Methane (C1) | 70–95 | | Ethane (C2) | 1–10 | | Propane (C3) | 0.5–5 | | Butanes+ (C4+) | 0.2–2 | | Carbon dioxide (CO₂) | 0–20 | | Hydrogen sulfide (H₂S) | 0–5 | | Nitrogen (N₂) | 0–5 | | Helium (He) | 0–0.1 | | Water vapor | Saturated |

Mercury destroys aluminum heat exchangers in LNG trains. While most sources mention activated carbon beds, the provides a kinetic model for mercury absorption through the amine system. It reveals that at low pH, amine solution can release elemental mercury downstream—a catastrophic event the handbook teaches you how to avoid via real-time oxidation-reduction potential (ORP) monitoring. gas processing handbook exclusive

"Sweetening" is the process of removing acidic components, primarily hydrogen sulfide ($H_2S$) and carbon dioxide ($CO_2$). | Component | Volume % (varies by field)