Glossary - Introduction to Carbon Capture and Sequestration - page 564

where j is the fl ux and p R - p P the pressure difference of the gas between
the retentate and permeate.

Permeate

The part of a gas mixture that passes through a membrane.

PETM

See Palaeocene-Eocene Thermal Maximum.

Phase saturation

The fraction of the pure volume that is occupied by phase i is called the
phase saturation (e.g., brine saturation or CO 2 saturation):

V V

i i

S == ,

φ

i

VV

p T

where V i is the total volume of phase i and V p is the pore volume. In the
second equation, φ is the porosity and V T is the total volume of the rock.

Plate tower

Type of absorber in which plates ensure optimal contact between the gas
and the liquid.
See also packed column.

Porosity

The volume fraction of a rock that is occupied by pore space ( φ ).

Post-combustion carbon capture

Process in which the CO 2 is removed after the burning of the fossil fuels.