Question

How geological sequestration of co2 by injection into the earth's surface?

Answer 1

Saline aquifers, predominantly water wet, are prime candidates for geologic CO2 sequestration. In water wet media and a capillary-dominated flow regime, snap-off is the dominant trapping mechanism at the pore scale. Capillary trapping of the nonwetting gas phase occurs during water flooding when the gas saturation is decreasing, and the water saturation increases as it invades the pore space. During the injection of CO2 in the geologic formation, the gas saturation increases in a drainage-like process. Vertical flow paths are created as the gas phase migrates laterally away from the injection wells and to the top of the aquifer due to buoyancy forces. Once the injection stops, the CO2 continues to migrate upward. At the leading edge of the CO2 plume, gas continues to displace water in a drainage process (increasing gas saturation), while at the trailing edge water displaces gas in an imbibition process (increasing water saturations). The presence of an imbibition saturation path leads to snap-off and, subsequently, trapping of the gas phase. A trail of residual, immobile CO2 is left behind the plume as it migrates upward.


Hope it will help you
Plzzzz mark as a brainlist.

Answer 2

Answer:

Geologic co2 Sequestration

Geologic co2 SequestrationGeological sequestration, or geologic carbon storage, is a type of CCS that uses the natural trapping ability of the earth's deep subsurface environment to store CO2 that has been injected into that realm.