Process and performance simulation analysis of rectifying carbon capture based on LNG cold energy
This study proposes a liquefaction purification process for high concentration CO2 as-sociated gas after desulfurization and dealkylation in natural gas fields by utilizing the cold energy of liquefied natural gas.The process,consisting of two organic Rankine cycles,a refrigeration cycle,a glycol solution cycle and a distillation system,can capture carbon dioxide from the associated gas and produce liquid CO2 of 99.99％purity.A thermodynamic model is established to simulate and evaluate the performance of the process,and to analyze the sensitivity of the parameters.The objec-tive function to maximize exergy efficiency is realized by optimizing the key parameters of the pro-posed system.The results indicates that the maximum exergy efficiency of 69.77％is achieved.The exergy flow of the process and the exergy loss of each component are then analyzed to provide a reference for the design of cold energy carbon capture system of the large-scale LNG receiving ter-minals.
LNGcold energy utilizationcarbon capturepurification liquefaction
万方数据
维普
