The Mercury Removal Unit (MRU) is a critical gas conditioning process used to remove trace elemental and organic mercury (Hg) from natural gas streams. Mercury, even at extremely low concentrations, can cause severe corrosion and amalgamation damage to aluminum heat exchangers used in cryogenic units such as LNG and NGL recovery plants. In a typical MRU, natural gas passes through fixed-bed vessels filled with adsorbent media such as sulfur-impregnated activated carbon or molecular sieves, where mercury is captured. Dual-vessel configurations allow continuous operation during adsorbent replacement. Effective mercury removal ensures equipment protection, enhances plant reliability, and ensures compliance with downstream process and safety requirements.