In the topsides of the liquefied natural gas floating production, storage, and offloading (LNG FPSO) unit, there are production units for methane, ethane, butane, condensate, etc. The units are designed considering the production capacity and the feed gas composition. After the feed gas is separated into gas, condensate, and water from the inlet treatment unit, the impure substances such as mercury, acid gas, and water are removed from the gas and are then liquefied in a liquefaction unit to produce liquefied natural gas (LNG). The condensate is separated into light and heavy components by a condensate stabilization unit to meet the sales specifications. In this paper, the basic functions, equipment, and processes of a condensate stabilization unit and a liquefaction unit are studied to identify the design considerations and challenges that need to be taken into account when installing these units in the offshore environment.

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