scholarly journals Adsorption behaviour of the binary mixtures of octane and nonane at sub-monolayer coverage on graphite

2001 ◽  
Vol 3 (17) ◽  
pp. 3774-3777 ◽  
Author(s):  
Miguel Castro ◽  
Stuart M. Clarke ◽  
Akira Inaba ◽  
Robert K. Thomas ◽  
Thomas Arnold
Keyword(s):  
Binary Mixtures ◽  
Adsorption Behaviour ◽  
Monolayer Coverage

Selective liquid sorption and wetting of pillared montmorillonites

Clay Minerals ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 331-339 ◽  
Author(s):  
F. Berger ◽  
I. Dekany ◽  
K. Beneke ◽  
G. Lagaly
Keyword(s):  
Binary Mixtures ◽  
Adsorption Behaviour ◽  
Calorimetric Data ◽  
Hydrophobic Character ◽  
Pillared Montmorillonite ◽  
Wetting Properties ◽  
Heat Of Wetting ◽  
Pillared Montmorillonites ◽  
Heats Of Immersion

AbstractPillared montmorillonite was used as an adsorbent for binary mixtures of hydrocarbons and alcohols (benzene/n-heptane; ethanol/cyclohexane; ethanol/toluene; propanol/ toluene). The adsorbent was prepared from the Na-form of a bentonite from Milos by reaction with polyhydroxoaluminium solutions. The adsorption behaviour of the pillared montmorillonite was characterized by the adsorption excess isotherms and the heats of immersion. Sorption capacities and wetting properties differed significantly from those of the Na-montmorillonite. Benzene was adsorbed preferentially from mixtures with n-heptane. Ethanol and propanol were also preferentially adsorbed from mixtures with cyclohexane and toluene but the curves showed azeotropic points at molar fractions of alcohols of 0.7-0.9. The calorimetric data revealed the partially hydrophobic character of the pillared montmorillonite. The heat of wetting of benzene or toluene on the pillared samples was distinctly higher than that of ethanol whereas ethanol gave the highest wetting enthalpies on Na-montmorillonite.

On the role of partition and surface reactions in the adsorption of binary liquid mixtures on silica gel

1988 ◽  
Vol 66 (6) ◽  
pp. 1371-1378
Author(s):  
Prem P. Singh ◽  
Krishan K. Sharma
Keyword(s):  
Binary Mixtures ◽  
Silica Gel ◽  
Surface Reaction ◽  
Adsorption Process ◽  
Surface Reactions ◽  
Liquid Mixtures ◽  
Adsorption Behaviour ◽  
Binary Liquid ◽  
Distribution Process

The adsorption behaviour of benzene (A), toluene (A), p-xylene (A), and o-xylene (A) in their binary mixtures with o-chlorotoluene (B) on silica gel has been studied at 308.15 K. The data have been analysed in terms of a model that assumes that partition and surface reactions play an important role in the adsorption process, and have revealed that while both partition and surface reactions dictate the adsorption (U-shaped isotherms) of o-chlorotoluene (OCTE) (B) from benzene (A) or toluene (A) + OCTE (B) mixtures, the adsorption of A and B entities of p-xylene (A) or o-xylene (A) + OCTE (B) mixtures (S-shaped isotherms) onto the silica gel surface is governed primarily by the distribution process and secondarily by the surface reaction.

On the Electrochemical Behavior of Pyrylium Ions at the Mercury-Electrode. III. Adsorption Behavior at the Aqueous-Mercury Interface

1987 ◽  
Vol 40 (3) ◽  
pp. 579 ◽  
Author(s):  
WNC Garrard ◽  
FG Thomas
Keyword(s):  
Sulfuric Acid ◽  
Electrochemical Behavior ◽  
Mercury Electrode ◽  
Adsorbed Layer ◽  
Adsorption Behaviour ◽  
Vertical Orientation ◽  
Aqueous Mercury ◽  
Low Solubility ◽  
Monolayer Coverage ◽  
Positively Charged

The adsorption behaviour of four pyrylium ions-2,4,6-trimethylpyrylium, 2,4,6-tri-t- butylpyrylium , 2,4,6-triphenylpyrylium and 7-phenyl-5,6,8,9-tetrahydrodibenzo[ c,h ] xanthylium -at the mercury-aqueous 0.5 M sulfuric acid interface is reported. The 2,4,6-trimethylpyrylium ion shows little tendency to adsorb at the mercury interface even at concentrations approaching saturated solution. The tri-t- butylpyrylium ion is adsorbed in a vertical orientation on a positively charged electrode, while on a negatively charged electrode it exhibits two position adsorption- initially flat then reorienting to vertical at higher concentrations. Triphenylpyrylium ions form an adsorbed layer of vertically oriented ions which approaches monolayer coverage at potentials just prior to its reduction at -0.68 V. The product of the reduction inhibits the reduction of the parent ion. The xanthylium ion behaves in a similar manner to the tri-t-butyl ion but the conclusions are tentative due to the limited reliability of the data as a consequence of the low solubility of this ion in water.

Thermodynamic properties of binary mixtures containing thiaalkanes

1980 ◽  
Vol 77 ◽  
pp. 445-449 ◽  
Author(s):  
Zohra Ferhat-Hamida ◽  
Robert Philippe ◽  
Jean-Claude Merlin ◽  
V. Kehiaian
Keyword(s):  
Thermodynamic Properties ◽  
Binary Mixtures
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