Pontificia Universidad Católica de Chile Pontificia Universidad Católica de Chile
del Valle J.M., Calderón D., Núñez G.A. (2019)

Pressure drop may negatively impact supercritical CO2 extraction of citrus peel essential oils in an industrial-size extraction vessel

Revista : Journal of Supercritical Fluids
Volumen : 144
Páginas : 108-121
Tipo de publicación : ISI Ir a publicación


We determined the effect of pressure drop (ΔP) in a 3.6-m tall vessel on the CO2 extraction of Citrus Peel Oil (CPO). We represented mass transfer using a linear-driving-force model and a pseudo-Sips’ desorption isotherm for CPO. A single microstructural factor (877) was estimated from literature data on CPO extraction at several extraction conditions. We simulated the effect of ΔP on CPO extraction at 50 °C varying particle diameter (0.5 ≤ dp ≤ 2 mm), bed porosity (0.20 ≤ ε ≤ 0.35), and inlet CO2 pressure (9 ≤ Pin ≤ 10 MPa) under incipient fluidization conditions. The negative effect of ΔP on CPO extraction increased markedly as dp or ε decreased, or as Pin increased, with a 1.8 time increase in extraction time as compared to isobaric conditions when using 4.54 kg s−1 m−2 of CO2 at 50 °C and 10 MPa (dp = 0.5 mm and ε = 0.30).