Measuring and modeling adsorption equilibria of non-volatile compounds dissolved in supercritical carbon dioxide on nanoparticles using dynamic methods

Publikationstyp
Journal Article
Date Issued
2016-07
Sprache
English
Author(s)
Kern, Johannes  
Johannsen, Monika  orcid-logo
Institut
Bioprozess- und Biosystemtechnik V-1  
TORE-URI
http://hdl.handle.net/11420/4738
Journal
The journal of supercritical fluids  
Start Page
72
End Page
79
Citation
Journal of Supercritical Fluids (113): 72-79 (2016)
Publisher DOI
10.1016/j.supflu.2016.03.018
Scopus ID
2-s2.0-84961869712
Adsorption equilibria of benzoic acid and ibuprofen on AlO(OH) nanoparticles were measured for the first time using a dynamic method, frontal analysis. Possible techniques for creating packed beds of nanoparticles are presented and their suitability for different chromatographic adsorption measurement methods is discussed. Benzoic acid adsorption was measured at 40 °C and 16 MPa on AlO(OH) solid and hollow spheres, ibuprofen adsorption was measured at 40 °C and varying pressures of 10, 15 and 20 MPa on AlO(OH) hollow spheres. A dry packing method was used to create packed beds for the adsorption experiments. The experimental data was modeled with a Peng-Robinson EoS/RAST/BET approach, which shows excellent agreement with the data. The model is discussed as a way to model adsorption in high pressure drop packed beds.
Subjects
Adsorption equilibria
Equation of state
Frontal analysis
Nanoparticles
Supercritical carbon dioxide
DDC Class
620: Ingenieurwissenschaften