Use analytical tools to investigate LNG molecular sieve underperformance

R. Herold, Shell Global Solutions International, Amsterdam, The Netherlands In an LNG plant, natural gas from the wellhead must be treated before liquefaction can take place. This treatment happens in dedicated units where contaminants like water, mercury and sour components are removed. These treating facilities are an essential part of LNG plants, helping ensure reliable LNG production. Generally, literature places emphasis on the design of future LNG plants, while the operational performance of existing facilities is infrequently discussed. When operational aspects are discussed, the focus is mainly on the liquefaction unit, as this unit consumes most of the energy in the plant.1, 2 How