Thermodesorption Studies of Energetic Properties of Ni/MgO−Al2O3Catalysts. Determination of Adsorption Energy Distribution Functions

Langmuir ◽  
2005 ◽  
Vol 21 (16) ◽  
pp. 7311-7320 ◽  
Author(s):  
Tomasz Panczyk ◽  
Wojciech Gac ◽  
Monika Panczyk ◽  
Anna Dominko ◽  
Tadeusz Borowiecki ◽  
...  
Keyword(s):  
Energy Distribution ◽  
Adsorption Energy ◽  
Distribution Functions ◽  
Energetic Properties ◽  
Adsorption Energy Distribution ◽  
Adsorption Energy Distribution Functions ◽  
Energy Distribution Functions

Heterogeneous Adsorption of Activated Carbon Nanofibers Synthesized by Electrospinning Polyacrylonitrile Solution

2006 ◽  
Vol 6 (11) ◽  
pp. 3577-3582
Author(s):  
Jae-Wook Lee ◽  
Hyun-Chul Kang ◽  
Wang-Geun Shim ◽  
Chan Kim ◽  
Kap-Seung Yang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Distribution ◽  
Carbon Nanofibers ◽  
Distribution Functions ◽  
Significant Information ◽  
Activated Carbon Nanofibers ◽  
Equilibrium And Kinetics ◽  
Adsorption Energy Distribution Functions ◽  
Energy Distribution Functions ◽  
Kinetics Of

This study focuses on the adsorption properties of activated carbon nanofibers (CNFs) fabricated by electrospinning polyacrylonitrile solutions dissolved in dimethylformamide, followed by heat treatment at high activation temperatures (700, 750, 800 °C). The samples were characterized by BET, SEM, and XRD. In addition, the adsorption energy distribution functions of CNFs were analyzed by using the generalized nonlinear regularization method. Comparative analysis of energy distribution functions provided significant information on the energetic and structural heterogeneities of CNFs. Furthermore, an investigation of adsorption equilibrium and kinetics of methylene blue (MB) and congo red (CR) revealed that the adsorption capacity and kinetics of MB are much higher and faster than that of CR on a given sample. Our experimental and theoretical results suggest that the CNFs used in this work may be widely used as an adsorbent.

The Study of Adsorption of Iodine on Carbon Black by Inverse Liquid Chromatography

2007 ◽  
Vol 80 (5) ◽  
pp. 895-906 ◽  
Author(s):  
D. Maafa ◽  
H. Balard ◽  
J. B. Donnet
Keyword(s):  
Carbon Black ◽  
Adsorbed Molecule ◽  
Distribution Functions ◽  
Irreversible Adsorption ◽  
Henry's Constants ◽  
Adsorption Energy Distribution ◽  
Desorption Isotherms ◽  
Adsorption Energy Distribution Functions ◽  
Energy Distribution Functions ◽  
Liquid Chromatographic

Abstract The study of iodine adsorption on carbon black samples was made using inverse liquid chromatographic frontal analysis (ILC). Unlike HPLC supports, the efficiency of the chromatographic column filled with a carbon black designed for rubber applications is low. Then the front boundaries of a non-adsorbed molecule, like heavy water (D2O) or acetone, was taken as reference for the calculation of the desorption isotherms. The monolayer capacity of adsorption, Langmuir's and Henry's constants were determined from the desorption isotherms. It was observed that 40% of the surface of the studied carbon black corresponds to a phenomenon of irreversible adsorption of the probe, and that the ILC also highlighted the heterogeneity of the studied carbon black. The adsorption energy distribution functions of iodine obtained by this method are similar to those which were already determined by IGC-FC with the heptane -like probe. The differences in behaviors between two families of carbon black could be attributed to the surface roughness.

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