This technical overview explains the critical role of filtration and separation systems in gas sweetening units that use amine solvents to remove H₂S and CO₂. It details how solid particulates, iron sulfides, degradation by-products, and hydrocarbon aerosols contribute to foaming, fouling, corrosion, and off-spec gas. The document maps specific filtration technologies—coalescers, liquid particle filters, and activated carbon vessels—to locations throughout the amine loop, from sour gas inlet to lean amine circulation. Optimized filtration reduces antifoam usage, protects equipment, improves absorption efficiency, extends solvent and carbon bed life, and lowers operating and maintenance costs.

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