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Modeling adsorption on energetically heterogeneous surfaces with an extended SAFT-VR approach
Publikationstyp
Journal Article
Date Issued
2018
Sprache
English
Author(s)
TORE-URI
Volume
133
Start Page
70
End Page
76
Citation
Journal of Supercritical Fluids (133): 70-76 (2018)
Publisher DOI
Scopus ID
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%.
Subjects
Adsorption
Carbon dioxide
Equation of state
Heterogeneous surface
SAFT-VR