Hidden challenges in mercury removal unit operation and design
11/5/2025
Mercury removal units (MRUs) are typically regarded as simple fixed-bed systems operating in a passive mode, with minimal instrumentation and limited dynamic behavior. This perceived simplicity sometimes leads to an underestimation of their importance within the overall gas treatment chain. In liquefied natural gas (LNG) production, the role of MRUs is particularly critical. Their primary function—the removal of trace mercury from feed gas—is essential to prevent corrosion and liquid metal embrittlement of aluminum-based cryogenic equipment. Even extremely low concentrations of elemental mercury can cause irreversible damage to brazed aluminum heat exchangers and other sensitive components
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