The Acid Gas Removal Unit (AGRU) is a critical gas treatment process in midstream and gas processing facilities, designed to remove acidic contaminants such as hydrogen sulfide (H₂S) and carbon dioxide (CO₂) from raw natural gas. Sour gas enters the amine absorber, where it contacts lean amine solution that selectively absorbs acid gases, producing sweet gas suitable for downstream processing or export. The rich amine is then routed to the regeneration section, where heat is applied in the stripper and reboiler to release the absorbed acid gases. These acid gases are sent to sulfur recovery or incineration, while regenerated lean amine is cooled and recycled back to the absorber. Effective acid gas removal protects pipelines and downstream units from corrosion, ensures gas quality compliance, and enables safe and environmentally responsible operation of gas processing facilities.