Depressurization of a 50 km Long 24 inches CO2 Pipeline

AbstractWe describe the results of depressurizing an onshore 50km long, 24 inches buried pipeline from initially supercritical conditions. The event has been simulated using OLGA, a multi-phase pipeline simulation tool, recently adapted to handle single components like CO2. The simulated results deviate from the measurements during the two-phase release period. The obtained results suggest that small amounts of impurities matter, even at concentration as low as 1 Mole %. In addition, the simulated onset of boiling and the mass transfer rate between the liquid and gaseous phase is not supported by the experiments