Abstract:

Three floating liquefaction concepts aiming at offshore natural gas recovery，Liquefied Natural Gas（LNG），Heavy Liquefied Gas（HLG）or another similar concept Pressurized Liquid Natural Gas（PLNG）and Liquefied Unprocessed Well Stream（LUWS）have gained interest in the past decade，control or prevention of solid formation is crucial for all these processes.In this work，the solubility of carbon dioxide and heavy hydrocarbons in the gas mixture at low temperature is simulated and compared with literature data.Using Soave-Redlich-Kwong（SRK）equation of state（EOS）for the fluid phase and a fugacity model for the solid phase，the simulation of carbon dioxide solid behavior agrees with experimental data.The phenomenon of carbon dioxide and benzene solids existing together in gas mixture is analyzed，the result shows the difference in dealing with the potential solid formation components in the offshore liquefaction concepts.