An Investigation of Chromatographic Partitioning of CO2 and Multiple Impurities in Geological CO2 Sequestration

Didi Li, Xi Jiang
2015 Energy Procedia  
Different solubilities of CO 2 and impurities contained in the injected streams would result in partitioning of the components at the leading gas front advancing through the aqueous phase. In this study, the chromatographic partitioning phenomena of CO 2 with multiple impurities are investigated by numerical simulations. Three most common impurities, i.e., N 2 , H 2 S and CH 4 , are selected and studied. Compared with the partitioning phenomenon of CO 2 and H 2 S, our simulation results
more » ... ion results indicate that, the inclusion of less soluble N 2 and/or CH 4 results in an earlier gas breakthrough and a longer delay between the breakthrough times of CO 2 and H 2 S. This is mainly because that the addition of N 2 and/or CH 4 lowers the viscosity of the gas phase, resulting in much higher gas mobility than that of the CO 2 -H 2 S mixture. Thus, gas mixture contacts with brine over a larger area, giving rise to more efficient stripping of H 2 S.
doi:10.1016/j.egypro.2015.07.398 fatcat:z3mcl6zcsnbe5cctklbqw33dzi