PD Dr. habil. Monika Johannsen

Eißendorfer Str. 38, Building O, Room 1.012

Telephone +49 40 42878-4260

E-Mail: PD Dr. habil. Monika Johannsen.


Education

  • Chromatographic Separation Processes (Modul "Separation Technologies for Life Science")
  • Advanced Separation Processes (Modul "High Pressure Chemical Engineering")


Publications

[135524]
Title: Modeling adsorption on energetically heterogeneous surfaces with an extended SAFT-VR approach
Written by: Kern, J., Johannsen, M.
in: The Journal of Supercritical Fluids 2018
Volume: 133 Number:
on pages: 70-76
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Publisher: Elsevier B.V.
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Institution: Hamburg University of Technology, Eissendorfer Strasse 38, D-21073 Hamburg, Germany
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DOI: 10.1016/j.supflu.2017.07.014
URL: http://hdl.handle.net/11420/3909
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[doi] [www] [BibTex]

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Abstract: Adsorption equilibria of methanol/carbon dioxide mixtures on plain silica particles at 308 K and pressures of 10.1 MPa, 12.7 MPa, 15.1 MPa and 20.1 MPa were measured with the frontal analysis by characteristic points (FACP) method using supercritical fluid chromatography. The data show a bimodal adsorption energy distribution and cannot be sufficiently modeled with a two-dimensional SAFT-VR approach. Therefore, an extension of SAFT-VR is proposed to model adsorption on heterogeneous surfaces and applied to the presented data. It can be described by the extended model with very low ARDs between 1.0% and 2.4%.