Environmental Engineering Reference
In-Depth Information
ocean before they decompose, there is a net fl ux of organic carbon from
the atmosphere toward the deep ocean. This fl ux is referred to as the
“biological pump.”
Breakthrough curves
These curves give the point at which a solid absorbent material cannot
adsorb CO
2
anymore. Upon adsorption, a CO
2
front will form and slowly
move through the adsorption column until it has reached the end of the
column. At this point, the CO
2
breaks through the adsorber and the
adsorber needs to be regenerated.
Buoyancy
The difference in density that gives a resulting upward or downward force.
Calcite
One of the most abundant forms of carbon (CaCO
3
).
Capillary pressure
Pressure difference between the gas and liquid phases in a pore caused
by the capillary forces.
Capillary trapping
In capillary trapping or residual trapping, part of the CO
2
becomes immo-
bilized as small bubbles at the trailing edge of the mobile CO
2
plume,
while the plume itself continues to migrate to the highest point in the
formation.
See also
residual trapping.
Caprock
A fi ne-textured rock that has a very limited permeability to CO
2
and is
used as a seal to prevent CO
2
from reaching the surface.
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