Inverse gas chromatography at infinite and finite surface coverages was applied to evaluate the surface properties of an iron-modified sepiolite sorbent, Fe-sepiolite. The adsorptions of different nonpolar and polar probes were measured in the infinite-dilution regime, in the temperature range 483-513 K. For the organic probes used, the thermodynamic parameters (free energy, enthalpy, and entropy) of adsorption and the dispersive and specific components of the free energy of adsorption were determined and are discussed in terms of specific reactions that can occur on the adsorbent surface. Following the approach of Gutmann (The Donor Acceptor Approach to Molecular Interactions; Plenum Press: New York, 1978), acid/base surface characteristics were determined. The adsorption isotherms of n-hexane, benzene, chloroform, and tetrahydrofuran were used to estimate the specific surface areas, isosteric heats of adsorption, and adsorption energy distributions for the adsorption of organic molec...ules.
Source:
Industrial and Engineering Chemistry Research, 2011, 50, 20, 11467-11475
TY - JOUR
AU - Lazarević, Slavica
AU - Janković-Častvan, Ivona
AU - Onjia, Antonije E.
AU - Krstić, Jugoslav
AU - Janaćković, Đorđe
AU - Petrovic, Rada
PY - 2011
UR - https://cer.ihtm.bg.ac.rs/handle/123456789/768
AB - Inverse gas chromatography at infinite and finite surface coverages was applied to evaluate the surface properties of an iron-modified sepiolite sorbent, Fe-sepiolite. The adsorptions of different nonpolar and polar probes were measured in the infinite-dilution regime, in the temperature range 483-513 K. For the organic probes used, the thermodynamic parameters (free energy, enthalpy, and entropy) of adsorption and the dispersive and specific components of the free energy of adsorption were determined and are discussed in terms of specific reactions that can occur on the adsorbent surface. Following the approach of Gutmann (The Donor Acceptor Approach to Molecular Interactions; Plenum Press: New York, 1978), acid/base surface characteristics were determined. The adsorption isotherms of n-hexane, benzene, chloroform, and tetrahydrofuran were used to estimate the specific surface areas, isosteric heats of adsorption, and adsorption energy distributions for the adsorption of organic molecules.
PB - American Chemical Society (ACS)
T2 - Industrial and Engineering Chemistry Research
T1 - Surface Characterization of Iron-Modified Sepiolite by Inverse Gas Chromatography
VL - 50
IS - 20
SP - 11467
EP - 11475
DO - 10.1021/ie200595n
ER -
@article{
author = "Lazarević, Slavica and Janković-Častvan, Ivona and Onjia, Antonije E. and Krstić, Jugoslav and Janaćković, Đorđe and Petrovic, Rada",
year = "2011",
abstract = "Inverse gas chromatography at infinite and finite surface coverages was applied to evaluate the surface properties of an iron-modified sepiolite sorbent, Fe-sepiolite. The adsorptions of different nonpolar and polar probes were measured in the infinite-dilution regime, in the temperature range 483-513 K. For the organic probes used, the thermodynamic parameters (free energy, enthalpy, and entropy) of adsorption and the dispersive and specific components of the free energy of adsorption were determined and are discussed in terms of specific reactions that can occur on the adsorbent surface. Following the approach of Gutmann (The Donor Acceptor Approach to Molecular Interactions; Plenum Press: New York, 1978), acid/base surface characteristics were determined. The adsorption isotherms of n-hexane, benzene, chloroform, and tetrahydrofuran were used to estimate the specific surface areas, isosteric heats of adsorption, and adsorption energy distributions for the adsorption of organic molecules.",
publisher = "American Chemical Society (ACS)",
journal = "Industrial and Engineering Chemistry Research",
title = "Surface Characterization of Iron-Modified Sepiolite by Inverse Gas Chromatography",
volume = "50",
number = "20",
pages = "11467-11475",
doi = "10.1021/ie200595n"
}
Lazarević, S., Janković-Častvan, I., Onjia, A. E., Krstić, J., Janaćković, Đ.,& Petrovic, R.. (2011). Surface Characterization of Iron-Modified Sepiolite by Inverse Gas Chromatography. in Industrial and Engineering Chemistry Research
American Chemical Society (ACS)., 50(20), 11467-11475.
https://doi.org/10.1021/ie200595n
Lazarević S, Janković-Častvan I, Onjia AE, Krstić J, Janaćković Đ, Petrovic R. Surface Characterization of Iron-Modified Sepiolite by Inverse Gas Chromatography. in Industrial and Engineering Chemistry Research. 2011;50(20):11467-11475.
doi:10.1021/ie200595n .
Lazarević, Slavica, Janković-Častvan, Ivona, Onjia, Antonije E., Krstić, Jugoslav, Janaćković, Đorđe, Petrovic, Rada, "Surface Characterization of Iron-Modified Sepiolite by Inverse Gas Chromatography" in Industrial and Engineering Chemistry Research, 50, no. 20 (2011):11467-11475,
https://doi.org/10.1021/ie200595n . .
