The compactness of offshore natural gas processing systems is particularly crucial for adapting to offshore environments.To address the limited deck space and load-bearing capacity faced by floating liquefied natural gas production,storage,and offloading units(FLNG),the concept of a novel FLNG with pressurized liquefaction process(FPLNG)was proposed.The key technologies and application status of FLNG were elaborated,and the key technologies and storage solutions of FPLNG were analyzed.The key technologies of FPLNG enhance the solubility of CO2 and heavy hydrocarbons,simplifying the pretreatment and liquefaction processes.The synergy between low-temperature decarbonization technology and liquefaction process enables the integration of offshore natural gas pretreatment and liquefaction into a single process.Pressurized liquefied natural gas(PLNG)can be stored in high-pressure tanks with high-strength,low-temperature steel structures and tank containers.The high-pressure tank solution has lower costs than atmospheric pressure transportation when the pressure is approximately 0.5 MPa,and the transportation distance is less than 400 km.FPLNG has significant potential for the efficient development of China's deep-sea natural gas resources and is expected to be widely applied in the future.However,further research is needed to address issues such as fluid phase equilibrium.
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