C. Lutge et al., MODELING THE EXTRACTION OF PERYLENE FROM SPIKED SOIL MATERIAL BY DENSE CARBON-DIOXIDE, The Journal of supercritical fluids, 7(4), 1994, pp. 265-274
This paper deals with a physical model for the extraction of PAH peryl
ene from spiked silt by supercritical CO2 based on numerous extraction
experiments attained from a pilot plant. The solubility of perylene i
n dense CO2 is calculated by a HSVDW-model and the ternary equilibrium
of soil, perylene, and CO2 is described by BET-isotherms, keeping in
mind that adsorption phenomena mainly influence the extraction time of
the process. Due to the dominant effect of PAH-adsorption on the soil
, the extraction time is shortened by increasing temperature while the
pressure must be optimized for each mass flow and temperature, respec
tively.