Liquid CO2 fractionation and extraction
2.2.1. Liquid CO2 fractionation of concrete
The apparatus consisted of a modified specially designed glass
Soxhlet apparatus suitably positioned in a pressure vessel of volume
935 mL. The details of the experimental set up and the process
adopted had appeared in our earlier publications [9–11]. It consisted
of an upper compartment for placing the plant materials to
be extracted and provided with a siphon for periodical removal of
the extract into the bottom receptor glass vessel. The concrete (3 g)
was mixed with cleaned 3mmglass beads and placed in the upper
compartment to fill three-fourth (3/4) of the volume. The extraction
was carried out at room temperature maintained at 25±1 ◦C.